Earth's atmosphere

1. Which of the following is the layer closest to the ground?

• The troposphere

• The stratosphere

• The mesosphere

• The thermosphere

What gas makes up 78% of the air?

• Oxygen

• Nitrogen

• Carbon dioxide

• Water

In which layer are the clouds?

• The mesosphere

• The stratosphere

• The troposphere

• The thermosphere

What can you find in the exosphere?

• shooting stars

• aeroplanes

• artificial satellites

• clouds

In which layer is the ozone layer?

• The mesosphere

• The stratosphere

• The troposphere

• The thermosphere

What layer of the atmosphere do we live in?

• The mesosphere

• The stratosphere

• The troposphere

• The thermosphere

The mesosphere lies above the stratosphere.

• True

• False

Mesosphere is a layer that is often referred to as the cold layer,

• I agree.

• I do not agree.

The uppermost region of Earth's atmosphere as it gradually fades into the vacuum of space.

• The mesosphere

• The stratosphere

• The troposphere

• The thermosphere

• The exosphere

The ozone layer shields us from harmful ultraviolet (UV) rays that come from the moon.

• True

• False