Study Guide on Atmosphere and Layers

The atmosphere is:

• a layer of gases surrounding the Earth

• the solid surface of the Earth

• the Earth's core

• a type of weather phenomenon

The atmosphere is a thin layer of gases surrounding the Earth, made up of nitrogen, oxygen, carbon dioxide, water vapor, and other gases.

• nitrogen, oxygen, carbon dioxide, water vapor, other gases

• hydrogen, helium, methane, ammonia, other gases

• argon, neon, krypton, xenon, other gases

• methane, ethane, propane, butane, other gases

Water vapor is:

• a solid form of water

• a liquid form of water

• a gaseous form of water

• a plasma form of water

Fill in the blank: Ozone forms when lightning interacts with oxygen in the air and creates a molecule of three oxygen atoms.

• oxygen, three oxygen atoms

• nitrogen, two nitrogen atoms

• carbon dioxide, one carbon atom

• hydrogen, two hydrogen atoms

Which layer of the atmosphere contains oxygen and sunlight, and warms the ground causing convection currents?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

Fill in the blank: The stratosphere contains the ozone layer, which absorbs UV radiation from the Sun.

• ozone layer, UV radiation

• troposphere, infrared radiation

• mesosphere, gamma radiation

• thermosphere, visible light

The mesosphere is a layer of Earth's atmosphere. What happens in the mesosphere?

• It is where weather occurs.

• It is where the ozone layer is located.

• It is where meteors burn up.

• It is where the auroras occur.

The exosphere has ________ and contains helium and hydrogen.

• no air to breathe

• plenty of oxygen

• a thick atmosphere

• a lot of nitrogen

What happens to air pressure as altitude increases?

• It decreases

• It increases

• It remains the same

• It fluctuates randomly

What is the source of radiation mentioned in the notes?

• Solar radiation

• Nuclear reactor

• X-ray machine

• Microwave oven