*Question*
Q: What does unequal heating of the atmosphere cause? Choices: - water - flares - humidity - weather A:
**Answer**
weather

*Question*
Q: Transforming from a caterpillar to a butterfly requires a lot of what? Choices: - Water - fuel - food - energy A:
**Answer**
energy

*Question*
Q: What is the main element in organic compounds? Choices: - hydrogen - oxygen - nitrogen - carbon A:
**Answer**
carbon

*Question*
Q: Shark teeth likely evolved from the jagged scales that cover their skin, called what? Choices: - heterotroph scales - hook scales - pinworm scales - placoid scales A:
**Answer**
placoid scales