Front

What are fossil fuels made from?

Back

Fossil fuels are sources of energy made from prehistoric plants and animals.

Front

Which of these is a nonrenewable resource?

Back

Coal is a nonrenewable resource.

Front

Why is ethanol considered a renewable fuel?

Back

Ethanol is considered a renewable fuel because it is made from corn.

Front

What must be true for a car engine to run?

Back

A car engine must have a fuel that can burn.

Front

What can biodiesel be made from?

Back

Biodiesel can be made from algae.

Front

What is a renewable resource?

Back

A renewable resource is a natural resource that can be replenished naturally over time.

Front

What is a nonrenewable resource?

Back

A nonrenewable resource is a natural resource that cannot be replenished in a short period of time.

Front

Give an example of a renewable resource.

Back

An example of a renewable resource is wind energy.

Front

Give an example of a nonrenewable resource.

Back

An example of a nonrenewable resource is oil.

Front

What is the main difference between renewable and nonrenewable resources?

Back

The main difference is that renewable resources can be replaced naturally, while nonrenewable resources cannot.