Q: Scientists think the solar system formed from a big cloud of gas and dust called what? Choices: - comet - supernova - Oort cloud - nebula A:
nebula

Q: When drinking water is treated, what is the term for when chemicals cause solids in the water to clump together? Choices: - clumping - oxidation - plasma - coagulation A:
coagulation

Q: Electrophiles have a strong tendency to react with what? Choices: - acids - neutrons - resistors - nucleophiles A:
nucleophiles

Q: Olfaction refers to which of the five senses? Choices: - sight - touch - taste - smell A:
smell