Q: What are clouds on earth made of? Choices: - rain - ozone - carbon dioxide gas - water vapor A:
water vapor

Q: Which property changes when a glass breaks? Choices: - State - Chemical - density - its physical property A:
its physical property

Q: A lewis acid is a substance that accepts a pair of electrons to form what? Choices: - accretion bond - functionality bond - ambivalent bond - covalent bond A:
covalent bond