What is the main source of light and heat on Earth?

It is a form of energy that enables you to see the things around you.

Which of the following is NOT an example of artificial light?

Avoid looking directly at the sun or any bright light.

It is the production of light by an organism as a result of the chemical reaction within the organism's body.

The universe is made up of tiny particles known as __________________.

An increase in the motion of these particles creates a form of energy called _________.

Objects that have low temperature are hot.

There is heat energy in the hot water and rocks found under the ground. It is called ______________.

Lift the lid of hot food with bare hands.

It is a form of energy produced by a vibrating body.

It is produced by regular vibration. It is a pleasant to hear.

It is produced by irregular vibrations without distinguishing rhythm.

Music can affect our mood and concentration. It can cause many other irritating disturbances.

It is a form of energy that produces light, heat, and sound. it may come from batteries or an electric power plant.

These are energy resources that can be replaced easily and are used in power plants.

These are energy sources that cannot be easily replaced in a short period once they are used up.

Which of the following is an example of Nonrenewable sources?

Which of the following is an example of Renewable sources?