Besides coal and natural gas, another fossil fuel  is

• petroleum/oil
• biomass
• electricity
• uranium

Fossil fuels are nonrenewable  resources because they

• take millions of years to form
• are easily replaced
• are in high demand
• don't pollute the air

The source of energy that comes from the intense heat beneath Earth's surface is

• nuclear fusion
• geothermal energy
• solar energy
• chemical energy

All of the following are renewable except

• uranium
• solar
• hydropower
• food crops (biomass)

The original source of energy for fossil fuels comes from the

• sun
• Earth's crust
• geothermal energy
• oceans

Moving water, tides, and dams are examples of

• hydropower
• fossil fuels
• geothermal energy
• radiant energy

This fossil fuel releases the least amount of air pollution

• natural gas
• coal
• nuclear
• oil

When steam or water are used to turn a turbine, it can generate

• electricity
• oil
• geothermal energy
• uranium

According to the graph, what sector is the greatest user of energy?

• industry
• commercial
• transportation
• residential

Approximately how much energy does the transportation sector use?

• 27%
• 52%
• 14%
• 8%