Problem:OPTIONS:
- solid
- concave
- convex
- spherical

Q: The most common curved mirrors are what? A:
****
A: spherical

Problem:OPTIONS:
- limestone , igneous and metamorphic
- plutonic, igneous and metmorphic
- crystalline , igneous and metamorphic
- sedimentary, igneous and metamorphic

Q: What are the three main types of rocks? A:
****
A: sedimentary, igneous and metamorphic

Problem:OPTIONS:
- oil
- food
- sugar
- fuel

Q: What is algae easier to covert into that corn is currently used for? A:
****
A: fuel

Problem:OPTIONS:
- pollinating seeds
- fertilizing them
- protecting them
- spreading seeds

Q: Fruit-eating bats receive food from plants and, in return, help these plants by doing what? A:
****
A:
spreading seeds