Changing Earth Ch

Which pair of natural resources includes one renewable resource and one nonrenewable resource?

• water and sunlight
• trees and oil
• minerals and natural gas
• coal and uranium

Why are fossil fuels used to run most power plants

• They produce relatively little pollution.
• Thy burn easily and produce a lot of heat.
• They are easily renewable resources
• Their by products are easily recycled.

What factors determine the type of coal that forms from buried plant material?

• depth and oxygen
• water and heat
• time and oxygen
• heat and pressure

What type of natural resource is used to make computer chips?

• plants
• oil
• minerals
• coal

Reusing a plastic grocery bag by using it as a trash bag helps save natural resources through what practice?

• polluting
• conservation
• elimination
• recycling

In addition to reducing the drain on natural resources, what other benefit comes from practicing conservation and recycling?

• It created stronger, more dependable materials
• it reduces the time necessary to deal with recycled materials
• it saves money when manufacturing new items.
• it reduces the trash that must be removed and buried. 

Collecting, sorting, and remaking materials are among the costs of

• recycling
• reusing
• reducing
• renewing

A disadvantage of nuclear power is that generating it

• does not produce enough energy
• is not an efficient form of energy
• produces dangerous waste products
• creates large amounts of air pollution

Solar cells, hydroelectric energy, biomass, and geothermal energy are all renewable forms of energy. Why are they potentially better to use than fossil fuels?

• They produce more power.
• Their power is obtained more cheaply.
• Their power is obtained more easily.
• Their sources exist in almost unlimited supply.

What is the main disadvantage of using hydrogen fuel cells to power automobiles?

• They produce pollution.
• They are too expensive.
• They do not produce enough power.
• They are not dependable.