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

Answer the following question given this paragraph: Reflecting surfaces do not have to be flat. The most common curved mirrors are spherical. A spherical mirror is called a concave mirror if the center of the mirror is further from the viewer than the edges are. A spherical mirror is called a convex mirror if the center of the mirror is closer to the viewer than the edges are. 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

Answer the following question given this paragraph: A geologic map shows the different rocks that are exposed at the surface of a region. Rock units are shown in a color identified in a key. On the geologic map of the Grand Canyon, for example, different rock types are shown in different colors. Some people call the Grand Canyon "layer cake geology" because most of the rock units are in layers. Rock units show up on both sides of a stream valley. Q: What are the three main types of rocks? A:
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A: sedimentary, igneous and metamorphic

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

Answer the following question given this paragraph: Research is being done into alternative crops for biofuels. A very promising alternative is algae. Algae appears to be a better biofuel than corn. Algae is much easier to convert to a usable fuel. Growing algae requires much less land and energy than crops. Algae can be grown in locations that are not used for other things. For example, they can be grown in desert areas where food crops are not often grown. Corn must be grown where food crops are grown. This can reduce the land and water available for growing food. Algae can be fed agricultural and other waste, so valuable resources are not used. Much research is being done to bring these alternative fuels to market. Q: What is algae easier to covert into that corn is currently used for? A:
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A: fuel

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

Answer the following question given this paragraph: Fruit-eating bats ( Figure below ) also receive food from plants. In return, they help these plants spread their seeds. When bats consume fruit, they also consume the seeds within the fruit. Then they carry the seeds in their guts to far-away locations. Q: Fruit-eating bats receive food from plants and, in return, help these plants by doing what? A:
****
A:
spreading seeds