The Earth's Atmosphere Quiz 2025

At 78%, this is the most abundant gas in the Earth's atmosphere.

• oxygen
• carbon dioxide
• water vapor
• nitrogen

The atmosphere is made up of 21% of this gas needed for cellular respiration.

• oxygen
• water vapor
• carbon dioxide
• argon

Although only 0.4% of this gas is in the atmosphere, plants require it make their food.

• oxygen
• carbon dioxide
• argon
• nitrogen

The lowest layer of the atmosphere, where our weather occurs.

• stratosphere
• ionosphere
• mesosphere
• troposphere

The outermost layer of the Thermosphere, that extends into space. Also the location of satellites.

• ionosphere
• mesosphere
• exosphere
• stratosphere

The ozone shield is found in this layer.

• stratosphere
• troposphere
• mesosphere
• thermosphere

This coldest layer of the atmosphere, is where meteoroids burn up on entry.

• troposphere
• ionosphere
• stratosphere
• mesosphere

The Northern lights (Aurora borealis) takes place here.

• Ionosphere
• stratosphere
• mesosphere
• troposphere

A group of interacting parts, with each piece influencing the behavior of the whole.

• A ionosphere
• A organism
• A system

The Earth's 4 spheres include

• biosphere, geosphere, atmosphere, cosmos
• atmosphere, biosphere, geosphere, space
• geosphere, atmosphere, biosphere, hydrosphere
• atmosphere, aquatic zone, outer space, lithosphere