how to identify rip tide
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What is a rip tide? How to spot and escape deadly rip currents that drag you out to sea Rip tides, also known as rip currents, are strong narrow currents that can pull swimmers out to sea. Some rip tides are so strong that they can drag swimmers away from shore before they realise what is happening. Swimmers should keep an eye out for rip tides while swimming in the sea at the beach. Rip tides can be identified by discoloured water, choppy waves and a foamy surface. They can be filled with debris. Swimmers are told to remember the ‘three Rs’ if they become caught in a rip tide.
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- LOS ANGELES, CA - NOVEMBER 27: Actress Jessica Alba and daughter Honor Warren attend Yo Gabba Gabba! Live! There's A Party In My City at Nokia L.A. Live on November 27, 2010 in Los Angeles, California.
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Currents, Waves, and Tides: The Ocean in Motion At the entrance of most beaches, there is a bulletin board with notices about water conditions: maybe a faded sign warning about rip currents and a list of this week's tide tables. Most people pass them by without a second thought, but if you want to enter the ocean, it is important to know its movements, whether to avoid being caught in a riptide or to figure out when the waves will be at their best. Current Affairs. A large movement of water in one direction is a current. Currents can be temporary or long-lasting; they can be near the surface or in the deep ocean. The largest ones shape the Earth’s global climate patterns (and even local weather conditions) by moving heat around the world.
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Tide Some shorelines experience a semi-diurnal tide-two nearly equal high and low tides each day. Others locations experience a diurnal tide-only one high and low tide each day. A mixed tide; two uneven tides a day, or one high and one low, is also possible. Tides vary on timescales ranging from hours to years due to a number of factors. To make accurate records, tide gauges at fixed stations measure the water level over time.
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Top Ten Reasons Climate Change is a Hoax Both of the tsunami warning centers use earthquake information, tide gauges and now a new tool from NOAA - tsunami detection buoys, developed by NOAA's Pacific Marine Environmental Laboratory.
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- Rip currents are present on many beaches every day of the. year, but they are usually too slow to be dangerous to beachgoers. However, under certain wave, tide, and beach shape conditions they. can increase to dangerous speeds. The strength and speed of a rip.
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Storm surge Surge can be measured directly at coastal tidal stations as the difference between the forecast tide and the observed rise of water. Another method of measuring surge is by the deployment of pressure transducers along the coastline just ahead of an approaching tropical cyclone.
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- 1 Swim out of the current in a direction following the shoreline. 2  When out of the current, swim at an angle--away from the current--towards shore. 3  If you are unable to swim out of the rip current, float or calmly tread water. 4  When out of the current, swim towards shore.
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- You have two high tides and two low tides within every 24-hour day and the time of slack water may be different between each. One other thing to remember is just because a tide is high at a certain inlet does not mean its high tide in the back bay estuaries.
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- In this movie, a survey ship with a multibeam sonar measures the depth of the sea floor. These depth measurements are then used to create rainbow-colored maps. In general, red is used to show shallow depths and blue or purple for deeper depths.
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- Keep an eye on your recorder. The fish could be feeding deep. The life and tuna will show when the tide slows down and the bait rises in the water column. In the interim try jigging at the depth you mark fish. Start the jigging above the fish and drop to their depth. Use detachable stingers. Why?
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Fish and Wildlife Research Institute A red tide is a higher-than-normal concentration of a microscopic alga (plant-like organism). In Florida, the species that causes most red tides is Karenia brevis (K. brevis). FWC reports on the current status of Karenia brevis blooms using tables, static maps, and interactive Google Earth maps.
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- (The surf zone is the area between the high tide level on the beach to the seaward side of breaking waves.) How do rip currents form? Rip currents form when waves break near the shoreline, piling up water between the breaking waves and the beach.One of the ways this water returns to sea is to form a rip current, a narrow stream of water moving swiftly away from shore, often perpendicular to the shoreline.The surf zone is the area between the high tide level on the beach to the seaward side of breaking waves.) How do rip currents form? Rip currents form when waves break near the shoreline, piling up water between the breaking waves and the beach.
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"1.5. What the heck does ""skel"" mean? How about ""PAA""? (NYPD Blue)" Rip: Loss in pay due to a disciplinary infraction, such as unauthorized moonlighting. RMP: Radio Mobile Patrol, the NYPD blue and white 'sector' car. Sector: Subdivision within a precinct, which covers several blocks. A sector car is assigned to patrol the area (see RMP above).
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- Right now, much of the information comes from satellite images, which are often obscured by clouds. In this particular red tide, we got a good image on July 23 - then we went weeks without another image, said University of South Florida ocean scientist Robert Weisberg. Weisberg is one among a team of researchers developing a prediction model based on ocean currents data, rather than satellite images.
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Networking 101: Understanding RIP Routing Remember, we said that RIP is a distance-vector protocol. The distance part is referring to the hop count in RIP, and the vector is the destination. Other distance-vector protocols may use other criteria for the vector, like an AS path in BGP. Both RIP flavors send their information every 30 seconds to UDP port 520.
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Aids to Navigation Yellow buoys, if lighted, will flash a yellow light. The rule for yellow buoys: Stay away. Special note on the meaning of the color yellow: While yellow means caution on these buoys yellow is also the designated color for identifying Intracoastal aids to navigation. As we will see later, all buoys and other aids on the Intracoastal Waterway will have at least some yellow on them. Daybeacons.
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"Shimul C.Size: 388You are sailing on the ocean and you see the North Star (Polaris) appearing directly above you. You are:at the North PoleOn the equatorAt the South PoleAt 45 degrees north latitudeat the North PoleWhich of the following is NOT true about a scientific theory?It is factualIt can be testedIt is developed over timeIt is based on observations of natureIt is factualThe latitude of Gainesville is about... 30 N30 S30 W16 N16 S30 NAfricaYou are at and sea and observe that when the sun is at its zenith, your watch set to Greenwich time reads 12 noon. What is your longitude?0 degrees E15 degrees E180 degrees W180 degrees E90 degrees E90 degrees W0 degrees EWhich is densest?a 1 kg solution that occupies a volume of 1 cm3a 2 kg solution that occupies a volume of 1 cm3a 3 kg solution that occupies a volume of 2 cm3a 2 kg solution that occupies a volume of 2 cm3a 2 kg solution that occupies a volume of 1 cm3RATE x TIME = DISTANCEHow long does it take for a current moving 3 km per hour to travel 30 km?10 min0.5 hr30 hr10 hr60 hrA large part of the profits of Phonician traders came from the sale of:papyruslamb meatgold and other metalswoven clothpurple dyePeople have been able to determine their longitude at sea sinceâ¦World War II (1940s)The Greeks (about 300 BC)Age of Discovery (16th century)18th centuryPrehistoric timesWhat motivated the Chinese Ming Dynasty rulers to embark on ocean expeditions?impress their neighborsobtain treasureexpand into new landslooking for good take-out foodestablish new trade routesWhat are ROVs?The major reason the early explorers were seeking a route to the East Indies (Southeast Asia) was: During the Middle Ages (500-1450 AD), oceanographic exploration voyages were being carried out by:The universe's observable mass consists mostly of hydrogen atoms. The lighter elements we see around us (mass of iron and lighter) were ________ . The heavy elements we see around us (heavier than iron) were ________ .Which of these is NOT true about Prokayotes? The process by which simple organic molecule building blocks form biological tissues is called:About how long after Earth formation did a liquid water ocean appear? The Nebula Hypothesis describes the formation of our:The correct order of earth layers, from most to least dense, is: Things you might see as you explore the mid-ocean ridge include all BUTblack smokerspillow basaltsabyssal hillstube wormsrift valley Compared to today, the distance from the shore to the shelf break 10,000 years ago would have beenâ¦Is the East coast of Australia active or passive?The continental shelf is the ________ .The magnetic reversal pattern in seafloor crustal rocks ____________.Who first proposed the concept of seafloor spreading? Compared to the continental crust, the ocean crust is _______ dense and is_________.Roughly how fast do most lithospheric plates move, on average? Volcanic island arcs are associated with __________ .Which of the following are NOT associated with convergent plate margins? deep-focus earthquakes deep-sea trenchesrift valleysisland arcs T/F: Hotspots occur only below ocean crust Which of the following is NOT a tool used to collect sediment particle samples from the ocean?deep-sea drillingdisc shovelgrab-samplersediment trapspiston-corerWhich type of sediments are the most abundant? Shells of microscopic planktonic microorganisms are primarily transported to the seafloorWhich is NOT true? Pelagic sediments ___________ .settle very slowly to the seafloorare deposited far from continental marginsare fine-grainedhave no terrigenous sediment particlesWhich of these is a place in the ocean that you would expect to have HIGHER than average salinity?near a location of sea ice formationNear a river mouthAlong the equatorNear a melting glacierIn which situation will the density of seawater be the greatest?10 oC, 40 ppt water40 oC, 40 ppt water40 oC, 10 ppt water10 oC, 10 ppt waterWhen a substance passes from a liquid to a gas, it ______ energy and its temperature ______The wind will blow:from a location of high to low atmospheric pressurefrom a location of low to high atmospheric pressurealong a line of equal atmospheric pressure (isobars)usually from north to southusually from south to northWhich of the following is NOT true of the Coriolis Effect?It is present on other planets such as MarsIt causes moving object to be deflected to the left in the Southern hemisphereIt is due to the rotation of the EarthIt is a fundamental 'force' along with gravity and magnetismIt is stronger at higher latitudesThe '3-cell' model of atmospheric circulation explains all of the following except:rainy climates at about 60 latitudehigh pressure zones at about 30 latitudethe very little precipitation at the polesprevalent winds out of the west between latitudes of 30 and 60relatively low pressure zones over continents in the summerIn the northern hemisphere, a northwesterly wind will cause a net Ekman transport current that is The ultimate Energy source driving surface ocean circulation isâ¦What is the name of the Eastern boundary current in the S. Pacific gyre? Which statement is FALSE?the center of ocean gyres are about 1-2 meters higher than the ocean marginscold core eddies are of relatively higher biological productivityMore water is carried by western versus eastern boundary currentsGeostrophic flow is a balance between wind-driven Ekman Transport and pressure gradient (gravitational) forcesIt would be a good idea to drill for oil in a location that was formerly: Which would NOT be typical of El Nino conditions?dryer conditions in SE Asiaweaker Trade Winds in the Pacificcooler waters off the coast of Peruwetter conditions in Central Americacollapse of the Peruvian anchovy fisheryThe number of hurricanes may be reduced in some years because ofâ¦ Where is the densest water in the worldâs ocean formed?The densest water in the world's ocean is: The distance between two wave crests is called the ___________ .While on a ship, you observe that wave crests 10 m apart are traveling 2 meters/sec. How much time passes between each wave? As a deep-water wave passes, water particles in the surface moveBecause of _________ , most waves reach the beach with wave crests that are roughly parallel to the shoreline. A long-term effect of wave refraction is:All of the following occur as a wave reaches shallow water, EXCEPT: What does the word ""tsunami"" mean in Japanese?The Indian Ocean tsunami of Dec. 2004 was caused by the rupture of a fault at aâ¦ _________ . A tidally driven wave that travels up a river called?If there is no moon (the new moon) tonight, in about how many days will the NEXT spring tide occur? Tides are ______ because they have very _______ compared to the depth of the ocean. .Which of the following are NOT examples of erosional coasts?Volcanic coastsFaulted coastsEmergent coastsCoasts with Fjordsdeltaic coastsWhat is the correct sequence in the erosion of a headland?The barrier island system and estuaries along the eastern coast of the United States is thought to have formed since: ____________ refers to the movement of sand grains along the beach.Which of the following is NOT an example of a hard stabilization structuregroinjettybreakwaterbeach renourishmentseawallWhich of the following depths would typically be considered the photic zone?The idea that biological traits become more or less common through variation in reproductive success is called: Which of these is NOT a way that variations in populations occur which may lead to new species, i.e. evolution?mutationgene flowgenetic driftlateral gene transfergene conversionThe primary reason Prof. Zimmerman favors a mainly vegetarian diet is because Compared to the terrestrial environment, the oceanic has:What is the energy source that drives chemosynthesis? One way we might remove CO2 from the atmosphere is by increasing algal production by fertilizing portions of the ocean with:Phytoplankton biomass will likely decrease soon after the spring bloom. Possible reasons include all EXCEPT which of the following?light limitationpredationnutrient depletiondisease/marine virus attackThe highest primary productivity in the surface ocean will be found where there isâ¦T/F: Bioluminescence only occurs in marine organisms that inhabit the aphotic zone In order to use echolocation, an organism must have an advancedOrganisms that can tolerate only a narrow range of salinity conditions are said to be:When do we think the first fish crawled onto land and evolved into tetrapods? Hint: they may have been after newly evolved insects or land plants.In the âreal worldâ, why would the anenomefish, Marlin, have been searching desperately for his son Nemo after his mother died? Which of the these is NOT a toothed whale?Humpback whaleDolphinSperm whaleOrcaNarwhalWhich of these Orders does NOT contain marine mammals?CetaceaCarnivoraSireniaChiropteraThe higher biological diversity of the benthic habitat (versus pelagic) is most likely due toâ¦At the base of the coral reef ecosystem is a symbiotic relationship between what two types of organisms? physical marine resourceshuman marine resources biological resourcesfishery target catch incidental catchdiscarded catchbycatchbycatch mitigationtrawling long-liningpurse seine NW Atlantic codboom and decline of cod effort CPUEoverfishedcommercial extinctiontragedy of the commons maximum sustainable yieldmost vulnerable for overfishing overfishing causes:overfishing solutions global warming evidencescientific consensus of global warming evidence of human caustation of global warmingwhat factors control sea level? major types of marine pollutioneutrophication solutions to eutrophicationcauses of ocean acidification effects of ocean acidificationWe think the biological diversity of land is greater than that of the ocean becauseâ¦.a) We haven't explored the oceans as fullyb) Ocean environment is more stable so less pressure to diversifyc) There are fewer barriers to organism migration in the oceand) There are not as many niches in the marine environment compared to landA floating heterotrophic animal might be classified as a:Although sunlight is at maximum availability, summer is not typically the time of greatest productivity in marine systems becauseâ¦ The latitudinal zone that typically has the lowest total annual marine primary productivity overall is:Which is NOT true?a) Some plants carry out chemosynthesisb) About half the oceanâs primary production is done by bacteriac) The great majority of marine primary production is carried out by single-cell organismsd) The organisms that cause âred-tidesâ are usually ProtistsA marine organism may cope with the high salinity of the ocean by all BUTâ¦Which of the following is NOT a reason an organism might use bioluminescence?a) To see in the darkb) Blind a predatorc) Attract preyd) Attract a matee) Become less visible to a predatorf) Aid in transportationTrue or False? ALL cephalopods are predatory carnivores.A shark is NOT a (n): Which is NOT true of baleen whales?a) they evolved from ungulates (cows, camels, hippos)b) they are thought to be less intelligent than toothed whalesc) they use echolocation to locate foodd) they were hunted to make corsetse) they include Grey, Blue and Humpback whalesWhich is NOT considered a possible contributory factor for 'coral bleaching'?lack of nutrientstoo much warming of watertoo much solar irradiancedisease (pathogen)influx of suspended sediment from erosionGiven the same wave period, waves with the greatest velocity (or celerity) _______ At what water depth will a deepwater wave with a wavelength of 10 meters FIRST begin to be slowed by interaction with the bottom?At which shoreline orientation in the figure above would the waves break closest to the shore (dashed line is sea surface)? Which type of large waves form because of constructive interference and other specialized conditions.What is frequently a warning sign of an impending tsunami? Tides that occur during half moons are called:A tidal pattern of one high and one low each day is called a: About how long does it now take for the Moon to orbit the Earth?Which of the following is NOT found on a Florida coast? Which one of the following is NOT built by waves depositing sediments (wave deposition)?A headlandA spitA barrier islandA beachA baymouth barWaves run up onto the beach forming a _________, and run back down as ________.swash ... backwashsurge ... swashfront swash ... retroswashfront wash ... backwashThe presence of a rip-current may be indicated by all EXCEPT:low spot on the beachmurky, darker waternear-shore area with no surfa portion of the longshore sand bar that is missingwaves approaching the beach at a high angleWhere does salt in the ocean come from? Although rivers always carry dilute salts to the ocean, seawater salinity is not continuously increasing because of which main salt removal process that was discovered relatively recently?Water makes life possible by all of these EXCEPT:keeping the earth from getting too hot near the equatorkeeping the earth from getting too cold near the polesbeing good at dissolving nutrients and other ionsevaporating quickly upon heatingfreezes on top and not all the way throughThe equatorial region of Earth is hottest because When air is cooled, it:Because of the Coriolis Effect, in the Southern Hemisphere, hurricanes circulateLocations near the ocean have a maritime (moderate) climate compared to mid-continent locations, for all of the following reasons EXCEPT: The _______________ acts to counteract the pile up of water towards the middle of ocean basins caused by wind-driven Ekman transport.Geostrophic Circulation results from a balance between which two forces: What is the name of the Western boundary current in the N. Pacific gyre?Great Britain is warmer than expected for its latitude because:What does La NiÃ±a involve?colder water in the equatorial east Pacifica strengthening in the trade windsdrought conditions in the Western Pacificchoices a and b onlychoices b and c onlyDue to global warming, hurricanes would be most likely toâ¦.increase in strength but not frequencyincrease in frequency but not strengthincrease in strength and frequencydecrease in strength and frequencybe about the same in strength and frequencyThe most CO2-rich and 'oldest' ocean bottom water is found in which ocean? sudden cooling of the temperate latitude climate (The Day After Tomorrow Effect) may be caused byâ¦Why is the slope of a slow spreading mid-ocean ridge steeper than that of a fast spreading mid-ocean ridge? Most of the Earthâs surface is found at two elevations. This is because:How do satellites sense the bathymetric contours (depths) of the ocean bottom from space?Submarine canyons are most likely created byWhy did Continental Drift hypothesis initially fail to gain wide acceptance?Which line of evidence does NOT support the theory of plate tectonics? What is the name of the supercontinent that Florida was attached to prior to joining Pangea?New oceanic lithosphere forms at __________ . At which kind of plate tectonic environment do the deepest earthquakes occur?The violent volcanoes of South America's Andes Mountains are a product of ________ .The formation of the Hawaiian Islands is associated with ____________. Aeolian sediment is transported and deposited byWhere in the ocean are you likely to find the thickest sediment deposit? Which of the following micro-organism (s) builds their shells out of calcium carbonate, is photosynthetic, and is the most abundant fossilized organism?Which of the following are NOT hydrogenous sediments? The prime meridian splits the earth into â¦â¦You are at and sea and observe that when the sun is at its zenith, your watch set to Greenwich time reads 10 pm. What is your longitude? A speed of 5 knots is ________ than 5 mph because a nautical mile is _________ than/as a mile.Who developed the first semi-accurate method of taking depth soundings? Who was one of the co-inventors of the scuba underwater breathing system (1943)?Greek thinkers in 300 BC suspected the Earth was a sphere because of all but the following: John Harrison's invention of the chronometer was important because ________.What statement best describes the big bang? How do we know exactly how old the Earth is?Microbes first evolved about _____ years ago and Eukaryotes about _____ years ago. Which of the following is NOT a scientific hypothesis of where life on Earth originated?How did Earth's early ocean form? The planets in our solar system formedEarth is ________ , meaning that gravity sorted out crustal components into the various layers we observe today. You are sailing on the ocean and you see the North Star (Polaris) appearing directly above you. You are: at the North Pole On the equator At the South Pole At 45 degrees north latitudeWhich of the following is NOT true about a scientific theory? It is factual It can be tested It is developed over time It is based on observations of nature The latitude of Gainesville is about... 30 N 30 S 30 W 16 N 16 SIf you are at the coordinates; 20 o S 35 o E, where are you? Pacific Ocean Atlantic Ocean South America Asia Africa You are at and sea and observe that when the sun is at its zenith, your watch set to Greenwich time reads 12 noon. What is your longitude? 0 degrees E 15 degrees E 180 degrees W 180 degrees E 90 degrees E 90 degrees WWhich is densest? a 1 kg solution that occupies a volume of 1 cm3 a 2 kg solution that occupies a volume of 1 cm3 a 3 kg solution that occupies a volume of 2 cm3 a 2 kg solution that occupies a volume of 2 cm3 RATE x TIME = DISTANCE How long does it take for a current moving 3 km per hour to travel 30 km? 10 min 0.5 hr 30 hr 10 hr 60 hrA large part of the profits of Phonician traders came from the sale of: papyrus lamb meat gold and other metals woven cloth purple dye People have been able to determine their longitude at sea sinceâ¦ World War II (1940s) The Greeks (about 300 BC) Age of Discovery (16th century) 18th century Prehistoric timesWhat motivated the Chinese Ming Dynasty rulers to embark on ocean expeditions? impress their neighbors obtain treasure expand into new lands looking for good take-out food establish new trade routes What are ROVs?The major reason the early explorers were seeking a route to the East Indies (Southeast Asia) was: During the Middle Ages (500-1450 AD), oceanographic exploration voyages were being carried out by:The universe's observable mass consists mostly of hydrogen atoms. The lighter elements we see around us (mass of iron and lighter) were ________ . The heavy elements we see around us (heavier than iron) were ________ .Which of these is NOT true about Prokayotes? The process by which simple organic molecule building blocks form biological tissues is called:About how long after Earth formation did a liquid water ocean appear? The Nebula Hypothesis describes the formation of our:The correct order of earth layers, from most to least dense, is: Things you might see as you explore the mid-ocean ridge include all BUT black smokers pillow basalts abyssal hills tube worms rift valleyAbout what % of the Earthâs surface is lower than 5000 meters below sea level? 20 5 80 95 40 Compared to today, the distance from the shore to the shelf break 10,000 years ago would have beenâ¦On the ocean basin cross-section shown in the figure, what is the geographic feature labeled ""F""? Is the East coast of Australia active or passive?The continental shelf is the ________ . Examine this map of sea floor ages. Which location of the Mid-Atlantic Ridge formed first?Examine this map of sea floor ages. When did the breakup of Pangaea first occur? The magnetic reversal pattern in seafloor crustal rocks ____________.Who first proposed the concept of seafloor spreading? Compared to the continental crust, the ocean crust is _______ dense and is_________.Roughly how fast do most lithospheric plates move, on average? Volcanic island arcs are associated with __________ .Which of the following are NOT associated with convergent plate margins? deep-focus earthquakes deep-sea trenches rift valleys island arcs The cross section above depicts magnetized oceanic crust at a spreading center. The ""+"" symbol indicates normal magnetic bands and the ""-"" symbol indicates reversed magnetic bands. How many events reversals of the Earth's magnetic field are depicted in the diagram?T/F: Hotspots occur only below ocean crust Which of the following is NOT a tool used to collect sediment particle samples from the ocean? deep-sea drilling disc shovel grab-sampler sediment traps piston-corerWhich type of sediments are the most abundant? Shells of microscopic planktonic microorganisms are primarily transported to the seafloorWhich is NOT true? Pelagic sediments ___________ . settle very slowly to the seafloor are deposited far from continental margins are fine-grained have no terrigenous sediment particles What is the cause of the high salinity region labeled âAâ?Which of these is a place in the ocean that you would expect to have HIGHER than average salinity? near a location of sea ice formation Near a river mouth Along the equator Near a melting glacier In which situation will the density of seawater be the greatest? 10 oC, 40 ppt water 40 oC, 40 ppt water 40 oC, 10 ppt water 10 oC, 10 ppt waterWhen a substance passes from a liquid to a gas, it ______ energy and its temperature ______ Between 300 and 1000 m depth, what does the ocean profile curve labeled 'density' on the figure represent?The wind will blow: from a location of high to low atmospheric pressure from a location of low to high atmospheric pressure along a line of equal atmospheric pressure (isobars) usually from north to south usually from south to north On this day in Gainesville (atmosphere pressure map shown below), the winds will be:Which of the following is NOT true of the Coriolis Effect? It is present on other planets such as Mars It causes moving object to be deflected to the left in the Southern hemisphere It is due to the rotation of the Earth It is a fundamental 'force' along with gravity and magnetism It is stronger at higher latitudes If you were on an island located at 15 degrees South, what wolud be the predominant wind?In the figure, which location is typically of low atmospheric pressure? The '3-cell' model of atmospheric circulation explains all of the following except: rainy climates at about 60 latitude high pressure zones at about 30 latitude the very little precipitation at the poles prevalent winds out of the west between latitudes of 30 and 60 relatively low pressure zones over continents in the summerIn the northern hemisphere, a northwesterly wind will cause a net Ekman transport current that is The ultimate Energy source driving surface ocean circulation isâ¦What is the name of the Eastern boundary current in the S. Pacific gyre? Which statement is FALSE? the center of ocean gyres are about 1-2 meters higher than the ocean margins cold core eddies are of relatively higher biological productivity More water is carried by western versus eastern boundary currents Geostrophic flow is a balance between wind-driven Ekman Transport and pressure gradient (gravitational) forcesIt would be a good idea to drill for oil in a location that was formerly: Which would NOT be typical of El Nino conditions? dryer conditions in SE Asia weaker Trade Winds in the Pacific cooler waters off the coast of Peru wetter conditions in Central America collapse of the Peruvian anchovy fisheryThe number of hurricanes may be reduced in some years because ofâ¦ Where is the densest water in the worldâs ocean formed?The densest water in the world's ocean is: The distance between two wave crests is called the ___________ .While on a ship, you observe that wave crests 10 m apart are traveling 2 meters/sec. How much time passes between each wave? As a deep-water wave passes, water particles in the surface moveBecause of _________ , most waves reach the beach with wave crests that are roughly parallel to the shoreline. A long-term effect of wave refraction is:All of the following occur as a wave reaches shallow water, EXCEPT: What does the word ""tsunami"" mean in Japanese?The Indian Ocean tsunami of Dec. 2004 was caused by the rupture of a fault at aâ¦ _________ . A tidally driven wave that travels up a river called?If there is no moon (the new moon) tonight, in about how many days will the NEXT spring tide occur? Tides are ______ because they have very _______ compared to the depth of the ocean. .Which of the following are NOT examples of erosional coasts? Volcanic coasts Faulted coasts Emergent coasts Coasts with Fjords deltaic coasts What is the correct sequence in the erosion of a headland?In the coastal profile shown, the feature shown at Location B is: In the beach profile shown, what is the feature labeled A?The barrier island system and estuaries along the eastern coast of the United States is thought to have formed since: ____________ refers to the movement of sand grains along the beach.Where should you build a groin to extend the beach in front of your house? Who will be angry at you? To increase the width of the beach in front of hotel B (shown in the figure above), they should build a groin at position:Which of the following is NOT an example of a hard stabilization structure groin jetty breakwater beach renourishment seawall Which of the following depths would typically be considered the photic zone?The idea that biological traits become more or less common through variation in reproductive success is called: Which of these is NOT a way that variations in populations occur which may lead to new species, i.e. evolution? mutation gene flow genetic drift lateral gene transfer gene conversionThe primary reason Prof. Zimmerman favors a mainly vegetarian diet is because Compared to the terrestrial environment, the oceanic has:What is the energy source that drives chemosynthesis? One way we might remove CO2 from the atmosphere is by increasing algal production by fertilizing portions of the ocean with:Phytoplankton biomass will likely decrease soon after the spring bloom. Possible reasons include all EXCEPT which of the following? light limitation predation nutrient depletion disease/marine virus attack The highest primary productivity in the surface ocean will be found where there isâ¦T/F: Bioluminescence only occurs in marine organisms that inhabit the aphotic zone In order to use echolocation, an organism must have an advancedOrganisms that can tolerate only a narrow range of salinity conditions are said to be: This organism is a member of which phylum?This organism is a member of which phylum? When do we think the first fish crawled onto land and evolved into tetrapods? Hint: they may have been after newly evolved insects or land plants.In the âreal worldâ, why would the anenomefish, Marlin, have been searching desperately for his son Nemo after his mother died? Which of the these is NOT a toothed whale? Humpback whale Dolphin Sperm whale Orca NarwhalWhich of these Orders does NOT contain marine mammals? Cetacea Carnivora Sirenia Chiroptera The higher biological diversity of the benthic habitat (versus pelagic) is most likely due toâ¦At the base of the coral reef ecosystem is a symbiotic relationship between what two types of organisms? physical marine resourceshuman marine resources biological resourcesfishery target catch incidental catch discarded catch bycatch bycatch mitigationtrawling long-liningpurse seine boom and decline of codeffort CPUE overfished commercial extinction tragedy of the commonsmaximum sustainable yield overfishing causes:overfishing solutions global warming evidencescientific consensus of global warming evidence of human caustation of global warmingwhat factors control sea level? major types of marine pollutioneutrophication solutions to eutrophicationcauses of ocean acidification effects of ocean acidificationWe think the biological diversity of land is greater than that of the ocean becauseâ¦. a) We haven't explored the oceans as fully b) Ocean environment is more stable so less pressure to diversify c) There are fewer barriers to organism migration in the ocean d) There are not as many niches in the marine environment compared to land A floating heterotrophic animal might be classified as a:Although sunlight is at maximum availability, summer is not typically the time of greatest productivity in marine systems becauseâ¦ The latitudinal zone that typically has the lowest total annual marine primary productivity overall is:Which is NOT true? a) Some plants carry out chemosynthesis b) About half the oceanâs primary production is done by bacteria c) The great majority of marine primary production is carried out by single-cell organisms d) The organisms that cause âred-tidesâ are usually Protists Which of the following is NOT a reason an organism might use bioluminescence? a) To see in the dark b) Blind a predator c) Attract prey d) Attract a mate e) Become less visible to a predator f) Aid in transportationTrue or False? ALL cephalopods are predatory carnivores. A shark is NOT a (n):Which is NOT true of baleen whales? a) they evolved from ungulates (cows, camels, hippos) b) they are thought to be less intelligent than toothed whales c) they use echolocation to locate food d) they were hunted to make corsets e) they include Grey, Blue and Humpback whales Which is NOT considered a possible contributory factor for 'coral bleaching'? * lack of nutrients * too much warming of water * too much solar irradiance * disease (pathogen) * influx of suspended sediment from erosionGiven the same wave period, waves with the greatest velocity (or celerity) _______ At what water depth will a deepwater wave with a wavelength of 10 meters FIRST begin to be slowed by interaction with the bottom?Which type of large waves form because of constructive interference and other specialized conditions. What is frequently a warning sign of an impending tsunami?Tides that occur during half moons are called: A tidal pattern of one high and one low each day is called a:About how long does it now take for the Moon to orbit the Earth? Which of the following is NOT found on a Florida coast?Which one of the following is NOT built by waves depositing sediments (wave deposition)? * A headland * A spit * A barrier island * A beach * A baymouth bar Waves run up onto the beach forming a _________, and run back down as ________. * swash ... backwash * surge ... swash * front swash ... retroswash * front wash ... backwashIn the beach profile shown, what is the feature labeled C? The presence of a rip-current may be indicated by all EXCEPT: * low spot on the beach * murky, darker water * near-shore area with no surf * a portion of the longshore sand bar that is missing * waves approaching the beach at a high angleWhat is the direction of longshore transport in the photo? Where does salt in the ocean come from?Although rivers always carry dilute salts to the ocean, seawater salinity is not continuously increasing because of which main salt removal process that was discovered relatively recently? Water makes life possible by all of these EXCEPT: * keeping the earth from getting too hot near the equator * keeping the earth from getting too cold near the poles * being good at dissolving nutrients and other ions * evaporating quickly upon heating * freezes on top and not all the way throughWhat does the curve marked by the letter âBâ on the figure represent? The equatorial region of Earth is hottest becauseWhen air is cooled, it: Because of the Coriolis Effect, in the Southern Hemisphere, hurricanes circulateIn the figure, what are the prevailing winds at location ""A""? Locations near the ocean have a maritime (moderate) climate compared to mid-continent locations, for all of the following reasons EXCEPT:The _______________ acts to counteract the pile up of water towards the middle of ocean basins caused by wind-driven Ekman transport. What is the name of the Western boundary current in the N. Pacific gyre?Great Britain is warmer than expected for its latitude because: Which of the following situations will lead to marine upwelling?What does La NiÃ±a involve? * colder water in the equatorial east Pacific * a strengthening in the trade winds * drought conditions in the Western Pacific * choices a and b only * choices b and c only The most CO2-rich and 'oldest' ocean bottom water is found in which ocean?Why is the slope of a slow spreading mid-ocean ridge steeper than that of a fast spreading mid-ocean ridge? Most of the Earthâs surface is found at two elevations. This is because:How do satellites sense the bathymetric contours (depths) of the ocean bottom from space? On the ocean basin cross-section shown in the figure below, what is the geographic feature labeled ""G""?Submarine canyons are most likely created by Examine this map of sea floor ages. When did the breakup of Pangaea first occur?Examine this map of sea floor ages. When can it be concluded that the full Atlantic seaway (north and south Atlantic) was opened? Why did Continental Drift hypothesis initially fail to gain wide acceptance?Which line of evidence does NOT support the theory of plate tectonics? What is the name of the supercontinent that Florida was attached to prior to joining Pangea?New oceanic lithosphere forms at __________ . At which kind of plate tectonic environment do the deepest earthquakes occur?The violent volcanoes of South America's Andes Mountains are a product of ________ . Predict the direction of lithosphere movement in the region of the transform fault, schematically diagrammed in map-view at right.The formation of the Hawaiian Islands is associated with ____________. Aeolian sediment is transported and deposited byWhere in the ocean are you likely to find the thickest sediment deposit? Which of the following micro-organism (s) builds their shells out of calcium carbonate, is photosynthetic, and is the most abundant fossilized organism?Which of the following are NOT hydrogenous sediments? The prime meridian splits the earth into â¦â¦You are at and sea and observe that when the sun is at its zenith, your watch set to Greenwich time reads 10 pm. What is your longitude? A speed of 5 knots is ________ than 5 mph because a nautical mile is _________ than/as a mile.Who developed the first semi-accurate method of taking depth soundings? Who was one of the co-inventors of the scuba underwater breathing system (1943)?Greek thinkers in 300 BC suspected the Earth was a sphere because of all but the following:" The presence of a rip-current may be indicated by all EXCEPT: 1  low spot on the beach. 2  murky, darker water. 3  near-shore area with no surf.  a portion of the longshore sand bar that is 1  missing. waves approaching the beach at a high angle.
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Rip current The following are some characteristics that can be used to visually identify a rip: 1  There is a noticeable break in the pattern of the waves: the water often looks flat at the rip, in contrast to the lines of breaking waves on either side of the rip.
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Why We Should Care This current will move sand along the shore and a beach will be formed. The same current that transports a surfer down the beach from the point of entry will also move beach sand down the shoreline. When this longshore current turns seaward, it is called a rip current. Some areas have underwater canyons near the beach.
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Rip current Although rip tide is a misnomer, in areas of significant tidal range the rip currents may only occur at certain points of the tide. Too much water over the bar will not cause waves to break over the bar as, of course, will too little.
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- 1 YouTube.  ShieldsUP! test -- A way to tell if your ISP is blocking ports.
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Buoys and markers Buoys and markers are water traffic signs offering direction and information. They also help identify dangerous areas and restricted zones. Learn to identify the different types of buoys and markers and what they mean.
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What is a rip? Permanent rips. Permanent rips are stationary year round. As the intensity of the surf increases, so too does the intensity of the rip. Permanent rips often occur where there is a barrier to water movement along the beach such as headlands and rocks, or man-made barriers, such as wharves and drainage pipes.
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- Once you feel that you can give the inspector a very complete description of the basic tide questions it is time to start collecting tide data about three sites. This information should be copied and pasted into a spreadsheet (you will find more about this in the Process section and in the Teacher's section). When you select a location you will see a data table of the last 2 days.
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The Tides In a 24-hour period there are 2 high and 2 low tides. When the tide is rising, it’s known as flooding. When the tide is falling, it's known as ebbing. When there is no horizontal or vertical movement of the water, the tide is slack.n a 24-hour period there are 2 high and 2 low tides. When the tide is rising, it’s known as flooding. When the tide is falling, it's known as ebbing. When there is no horizontal or vertical movement of the water, the tide is slack.