Sources of Energy

Which of the following statements provides a reason for the widespread use of fossil fuels?

• Fossil fuels are a renewable source of energy.
• Fossil fuels are readily available and inexpensive.
• Fossil fuels are not harmful to the environment.
• All of the above.

Which of the following forms of renewable energy uses the sun's energy most directly?

• biomass fuel
•  solar heating
• geothermal energy
• a hydrogen fuel cell

The main reason for the worldwide slowdown in the construction of nuclear power plants is that

• we have run out of uranium fuel.
• the electricity from nuclear power is generally more expensive to produce than electricity from other sources.
• Nuclear reactors are inherently unsafe.
• nuclear reactors release large quantities of greenhouse gases.

Which is an example of the direct use of fossil fuels?

• a nuclear reactor
• an oil-fired furnace
• a wind generator
• a wood-burning stove

Which of the following is a fossil fuel?

• Wind
• Coal
• Solar
• Biomass

What is biomass? 

• energy from the sun
• energy from water
• energy from wind
• energy from plant and animal waste

What are two advantages of geothermal energy?

• cheap and a lot pollution
• expensive and a lot of pollution
• cheap and little pollution
• expensive and little pollution

Wind, geothermal, and solar energy are all what type of energy resources?

• cheap
• potential
• renewable
• chemical 

One problem with ____ energy is that it produces radioactive waste. 

• nuclear
• solar
• tidal
• wind

The law of _____ of energy states that energy cannot be created or destroyed, only transformed or changed. 

• renewal
• refreshing
• battery storage
• conservation