Atmosphere

Take a deep breath in, take a deep breath out. Most of the gas that passed through your mouth was

• oxygen

• nitrogen

• water vapor

• carbon dioxide

This gas is found in the stratosphere where it helps protect us from UV radiation.

• ozone

• oxygen

• nitrogen

• carbon dioxide

The Earth's atmosphere is divided into five layers. In which layer does all life exist?

• exosphere

• mesosphere

• stratosphere

• troposphere

Which layer of Earth's atmosphere contains the ozone layer, an important layer that helps protect life on Earth from UV radiation

• exosphere

• mesosphere

• stratosphere

• troposphere

In this layer of Earth's atmosphere, hydrogen and helium are the primary gases and are only present at extremely low densities. What is this layer of the atmosphere called?

• exosphere

• ionosphere

• mesosphere

• thermosphere

Most clouds appear here, mainly because 99% of the water vapor in the atmosphere is found in the

• mesosphere

• stratosphere

• thermosphere

• troposphere

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-5

Our _________ is the layer of gases that surrounds our planet.

• ocean
• weather
• atmosphere
• ozone

Which layer of the atmosphere would jets fly in to avoid a thunderstorm?

• troposphere

• thermosphere

• mesosphere

• stratosphere

Tags

NGSS.MS-ESS2-5

As you ascend (go up) in the troposphere what happens to the temperature?

• It increases steadily

• It decreases steadily

Why is the ozone layer vital to life on Earth?

• Planes fly in the ozone layer

• It is made up of oxygen (O₂)

• It shields the Earth from ultraviolet (UV) rays from the sun

• It causes clouds to be created