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Each answer is a single word that begins with the letter “P.” (e.g., A fundamental constituent of matter. Answer: Particle.)

Freshman Level

1. Large, spherical, rocky or icy body that orbits the sun or another star.

2. Formerly the ninth planet in our solar system.

3. One of the two ends of a magnet.

4. A device that breaks light into its composite wavelength spectrum.

Graduate Level

5. A distance equal to 3.26 light years.

6. The antiparticle of the electron.

7. A positively charged constituent of all atomic nuclei.

Ph.D. Level

8. The closest point to Earth on a satellite’s orbit.

9. A unit of energy in the form of light.

10. Time interval between two consecutive phases of a regularly occurring event.


1. Planet.

2. Pluto.

3. Pole (or positive).

4. Prism.

5. Parsec.

6. Positron.

7. Proton.

8. Perigee.

9. Photon.

10. Period.

North Atlantic Syndicate

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