Most of the energy we use originally came from:

• The sun

• The air

• The soil

• The oceans

Electrical energy can be produced from:

• Mechanical energy

• Chemical energy

• Radiant energy

• All of the above

Which uses the most energy in American homes each year?

• Lighting

• Water heating

• Heating and cooling rooms

• Refrigeration

The U.S. consumes lots of energy. Which fuel provides the most energy?

• Petroleum

• Coal

• Natural gas

• Solar

Coal, petroleum, natural gas, and propane are fossil fuels. They are called “fossil fuels” because:

• They are burned to release energy, and they cause air pollution.

• They were formed from the buried remains of plants and tiny animals that lived hundreds of millions of years ago.

• They are non-renewable and will run out.

• They are mixed with fossils to provide energy.

Gasoline is produced by refining which fossil fuel?

• Natural gas

• Coal

• Petroleum

• Propane

Propane is used instead of natural gas on many farms and in rural areas. Why is propane often used instead of natural gas?

What sector of the U.S. economy consumes most of the nation’s petroleum?

• Residential

• Commercial

Natural gas is transported by:

• Pipelines

• Trucks

• Barges

• All three equally

Global warming focuses on an increase in the level of which gas in the atmosphere?

• Ozone

• Sulfur dioxide

• Carbon dioxide

• Nitrous oxide