Third Quarterly Examination - Science 3

The following are the uses of electric energy, except?

A windmill uses water to spin rotors that generate electricity.

Coal, crude oil, and natural gas are called fossil fuels because they were formed from the fossilized, buried remains of plants and animals that lived million years ago.

Moonlight and starlight are useless to sailors when navigating the seas.

Mobile phones, machines, and gadgets don't need electricity to work.

Sound cannot be used to power vehicles and household appliances.

The sun is the natural source of light and is the main source of light on earth.

The cell of the bodies of humans produces lights as they burn up energy.

Animals make sounds to sleep and not to communicate.

A place or a position may also serve as a reference point.