science

All living things need

• Oxygen

• Carbon dioxide

• Nitrogen

_____is the gas that is used in photosynthesis

• Oxygen

• Carbon dioxide

• Nitrogen

Air exerts pressure always upward direction

• True

• False

The middle layer of the earth is called the

• Core

• Crust

• Mantel

The interior part of the earth is divided into___layers

• Four

• Three

• Two

The substance that cause pollution are called

• Carbon dioxide

• Pollution

• Pollutants

The innermost layer of the earth is called

• Mantel

• Core

• Crust

A disaster cause by lack of water

• Drought

• Flood

• Earthquake

Air is a mixture of __________.

• gases.

• living things.

• rocks.

The moon is_____satellite of the earth