*Question*
If combustion of oil causes acid rain, then what causes acid rain? Answer choices: - burn - oil - coal - lung - DDT - tar - Cars - wind
**Answer**
oil

*Question*
If an electric stove transforms the flow of electrons to heat, then what does an electric stove transform into heat? Answer choices: - hydrogen and oxygen - wavelengths and photons - flow of electrons - gas - pot - organic molecules - flow of neutrons - Organic compounds
**Answer**
flow of electrons

*Question*
If playing is one way sea lions learn how to behave, then what do sea lions learn how to behave from? Answer choices: - exercise - Energy. - fish - Movement - Energy - playing - children - whales
**Answer**
playing

*Question*
If asteroids are pulled down to Jupiter by gravity, then asteriods are often pulled into the planet Jupiter by what force? Answer choices: - heat - kalenchoes - energy - power - strong nuclear force - Gravity - Air Force - centrifugal force
**Answer**
Gravity