observe clouds forming measure the air temperature blow up a beach ball or balloon weigh a glass before and after it is filled with water
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Air has no color and cannot be seen, yet it takes up space. What could be done to show that air takes up space?
Possibilities:
- observe clouds forming
- measure the air temperature
- blow up a beach ball or balloon
- weigh a glass before and after it is filled with water

blow up a beach ball or balloon