Natural 2 (Unit 8)

The ability to do work is:

• combustion

• energy

• hydropower

• motion

What fuel can be used in existing vehicles with little or no modification to engines and fueling systems?

• benzene

• carbolic acid

• liquid biofuel

• methane

Because of the availability and minimum cost of wood, it is the most common:

• biofuel

• fossil fuel

• geothermal fuel

• nonfuel

Which is the largest renewable energy source for electricity generation in the United States?

• hydropower

• geothermal

• solar

• wind

What energy source can be produced in large tanks, called digesters, where manure and used bedding material from animal barns is broken down?

• agricultural biogas

• benzene

• geothermal fuel

• petroleum

The consumption of biofuels and other non-hydroelectric renewable energy sources is:

• increasing

• decreasing

• stagnant

• staying the same

Why does the United States produce less energy with renewable resources than with fossil fuels?

• All renewable energy creates smog

• Fossil fuel technology is underdeveloped

• Fossil fuels are more expensive

• Renewable energy is more expensive

Which is excluded from one of the five commonly used renewable

• biomass

• fossil fuels

• hydropower

• geothermal

Which of the following is NOT considered one of the main types of renewable energy resources?

• biomass

• fossil fuels

• hydropower

• geothermal

Energy that comes from water being heated inside Earth is best known as:

• geothermal

• hydropower

• nuclear

• solar