1) What is the surface area to volume ratio? 2) As things get bigger, what happens to their surface area to volume ratio?

3) How do changes in this ratio affect the ability of molecules (ex - water, nutrients, oxygen, etc) or heat to move into or out of something?

4) In the video, how did the agar cubes (pink cubes) prove that a higher the ratio of surface area to volume, the easier it is for substances to diffuse into or out of them?

5) Therefore…tell me why are cells so small?

6) Why do we have the instinct to fold our arms against our chest when it's cold?
(Answer in terms of surface area and volume)

7) Why does 1 cup of ice chips melt faster than 1 cup of solid ice?
(Answer in terms of surface area and volume)

8) Why do elephants have big ears?
(Answer in terms of surface area and volume)

9) Why are animals that live in cold water (whales, walruses, polar bears) very large?
(Answer in terms of surface area and volume)