Earth's atmosphere | Starter Quiz | Oak National Academy

Which of the following will you find in the Earth's atmosphere?

• aluminium

• gold

• nitrogen

• zinc

Answer explanation

Nitrogen forms 78% of the atmosphere on Earth.

What percentage of the Earth's atmosphere is carbon dioxide?

• less than 1%

• 1%

• more than 1%

Answer explanation

The Earth's atmosphere contains: nitrogen, oxygen, argon, carbon dioxide, water vapour and other gases. Carbon dioxide makes up less than 1% of Earth's atmosphere.

Which word is used to describe a substance that contains two or more different substances which are not chemically combined?

Answer explanation

A mixture is a substance that contains two or more different substances which are not chemically combined. Air is an example of a mixture.

Which term is used to describe the mass per unit volume?

• displacement

• density

• velocity

• temperature

Answer explanation

Density is the mass per unit volume.

The atmosphere is ...

• the space that exists between Earth and the Sun.

• all the living organisms within an ecosystem.

• a layer of gas that surrounds a planet.

Answer explanation

The atmosphere is a layer of gas that surrounds a planet. It contains a small amount of substances in the solid and liquid state.

Which gas in our atmosphere is essential for life on Earth?

Answer explanation

Oxygen is a gas in Earth's atmosphere which is essential for life.