Gr 9 Electricity Unit

Which of the following has chemical energy?

• gasoline

• wind

• lightning

Which action involves transforming chemical energy into thermal energy?

• using an electric toaster

• having a campfire

Which of the following is not needed for an electric generator?

• coil of wire

• magnet

• the sun

• motion

What are kilowatt hours used to describe?

• energy sources

• type of energy

• energy use

Which of the following is a fossil fuel?

• coal

• the sun

• steam

• uranium

Which of the following statements describes a renewable energy source?

• it always increases greenhouse gases

• it will eventually run out

• it can be replaced by natural processes

Using fossil fuels to produce electrical energy contributes to global climate change.

• True
• False

A cellphone charger stops using electricity as soon as the cellphone is unplugged from it.

• True
• False

All brands of refrigerators use the same amount of energy to keep food cold.

• True
• False

People can use solar panels and small wind turbines to generate electricity for their homes.

• True
• False