Atmospheric Review

The atmosphere's primary function is:

• Protecting Earth from meteorites

• Regulating temperature and providing oxygen

• Producing carbon dioxide for plants

• Preventing gas escape

The most abundant gas in Earth's atmosphere is:

• Oxygen

• Carbon dioxide

• Nitrogen

• Argon

The homosphere is:

• Where gases are uniformly mixed

• Where oxygen is concentrated

• A layer containing only nitrogen

• The highest atmospheric layer

Most meteors burn up in the:

• Stratosphere

• Mesosphere

• Thermosphere

• Exosphere

The ozone layer's function is:

• Blocking infrared radiation

• Reflecting radio waves

• Absorbing UV radiation

• Protecting against solar particles

The exosphere is the boundary of space because:

• Auroras occur there

• It contains nitrogen and oxygen

• It transitions into interplanetary space

• It reflects radio waves

The layer reflecting radio waves is:

• Troposphere

• Mesosphere

• Ionosphere

• Exosphere

The process removing carbon dioxide from the atmosphere is:

• Volcanic eruptions

• Photosynthesis

• Decomposition

• Combustion

Nitrogen fixation converts nitrogen into:

• Oxygen

• Ammonia and nitrates

• Carbon dioxide

• Water vapor

Auroras are caused by:

• Water vapor condensing

• Lightning in the ionosphere

• Solar wind interacting with Earth’s magnetic field

• Oxygen molecules absorbing infrared