Q: What are the things moving under the earth's mantle that move the crust? Choices: - crystals - ridges - lava channels - plates A:
plates

Q: Moist skin distinguishes frogs from what animal with dry, bumpy skin? Choices: - turtles - snakes - newts - toads A:
toads

Q: Q: What property are alkali metals at room temperature? Choices: - mixed - liquid - solid - solid A:
A: solid

Question: Q: Many enzymes are simple proteins consisting entirely of one or more of these? Choices: - alkali acid chains - interaction acid chains - proteins acid chains - amino acid chains A:
Answer: amino acid chains

*Question*
Q: When what common element forms single bonds with other atoms, the shape is tetrahedral, and when its atoms form a double bond, the shape is planar? Choices: - oxygen - hydrogen - silicon - carbon A:
**Answer**
carbon

Q: The sticky stigma at the tip of the carpel receives what? Choices: - bacteria - salt - nitrogen - pollen A:
pollen