Short Answers.

1. If a bowling ball and a Ping Pong ball both move horizontally with the same kinetic energy, which has the greater speed? Explain in terms of KE.
2. On cold winter nights in the old days it was common to bring a hot object to bed. Which would do a better job of keeping you warm through the cold night - a 10 kg iron block or a 10 kg jig of hot water at the same temperature? Discuss.
3. Since every iron atom is a tiny magnet, why aren't all things made of iron also magnets?
4. Which has more mass - a single water molecule, H2O or a single carbon dioxide molecule, CO2? Explain.
5. What is the difference between alpha particles, beta particles and gamma rays?
6. When liquid water freezes, is heat released to surroundings or absorbed from the surroundings? Explain.
7. Describe two differences between mitosis, meiosis.
8. Name the three pillars of natural selection.
9. Give one example of commensalism and one example of Mutualism.
10. A scientist studies how the number of coyotes in San Diego County has changed over the last decade. Is this a population level study, a community level study, or an ecosystem level study? Defend your answer.
11. Which type of life makes up the foundation of an energy pyramid? Heterotrophs, autotrophs, or decomposers? Why?
12. Briefly explain the theory of plate tectonics.
13. What is the difference between a rock and a mineral?
14. Where would you expect to see more runoff - along a city street or in a prairie meadow? Why?
15. At sea level, the air is about 23% oxygen. At the top of Mt. Everest, the air is still about 23% oxygen. So, why do almost all mountain climbers need to bring extra bottled oxygen to survive at the top of Mt, Everest?
16. 

78. Place the layers in order from oldest to youngest. (G is pointing to the fault line.) H A D G