Elevate Science Topic 2 Science Review

Front

What is combustion?

Back

The process of burning fuel to produce heat and light.

Front

Is fuel made from corn a renewable energy source?

Back

True, because we can always grow more corn.

Front

Why are renewable energy sources called 'clean energy'?

Back

Because they do not pollute the air or environment.

Front

Are fossil fuels formed from plants and animals that died last year?

Back

False, they are formed from plants and animals that died millions of years ago.

Front

What is coal?

Back

A hard, black substance formed from chemical changes in plants from millions of years ago.

Front

What is a renewable energy source?

Back

An energy source that can be replenished naturally, such as solar or wind energy.

Front

What are fossil fuels?

Back

Energy sources formed from the remains of ancient plants and animals, including coal, oil, and natural gas.

Front

What is an example of a nonrenewable energy source?

Back

Fossil fuels like coal, oil, and natural gas.

Front

What does it mean for energy to be 'clean'?

Back

It means that the energy source does not produce harmful pollutants.

Front

Can renewable energy sources help reduce pollution?

Back

Yes, because they do not emit harmful gases when used.