Q: Which energy source is considered nonrenewable? OPTIONS:
- oil
- moving water
- sunlight
- biomass
A: oil

An engineer constructs a prototype from wood. Which of the following is the best tool for the engineer to use to make the prototype's surface smooth?
OPTIONS:
- band saw
- chisel
- drill
- sandpaper

sandpaper

Q: If 1 kg of the compound toluene melts at -95C, then 500 g of toluene will ---- OPTIONS:
- melt at -47.5C.
- melt at -95C.
- boil at 95C.
- boil at 47.5C.

A: melt at -95C.

Signs in many stores and restaurants warn that microwaves are in use. What is the main reason for this warning?
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OPTIONS:
- Some people do not like food cooked in microwave ovens.
- Microwaves sometimes affect people's sense of sight.
- Microwaves sometimes cause hair or teeth to fall out.
- Some people have pacemakers that may be affected by microwaves.

Some people have pacemakers that may be affected by microwaves.

Question:
How do scientists know that some mountains were once at the bottom of an ocean?
OPTIONS:
- Freshwater rivers flow to the ocean.
- Saltwater fish are found in some mountain streams.
- Dinosaur bones have been discovered in the mountains.
- Marine fossils have been found on the peaks of some mountains.
Answer:
Marine fossils have been found on the peaks of some mountains.

Q: As the human population increases, more fossil fuels are being used. The burning of fossil fuels produces greenhouse gases. How might humans reduce greenhouse gases? ---- OPTIONS:
- Buy cars that use gasoline.
- Build power plants that use coal.
- Use renewable resources to generate power.
- Use nonrenewable resources to generate power.
A: Use renewable resources to generate power.