Atmosphere Basics

Which layer of the atmosphere contains the ozone layer?

• thermosphere

• mesosphere

• stratosphere

• troposphere

How do scientists know when one atmospheric layer ends and the next layer begins?

• They look for changes in air pressure.

• They look for changes in temperature.

• They look for changes in the density of air.

• They use specific altitudes to determine the layer.

Which factor remains the same for ALL layers of the atmosphere?

• Composition of gases

• Amount of pressure

• Average temperature

• Density of air molecules

What is the difference between the homosphere and the heterosphere?

• The homosphere is in the upper part of the atmosphere, and the heterosphere is in the lower part of the atmosphere.

• The homosphere contains a different composition of gases than the heterosphere does.

• The homosphere contains gases that are well-mixed, and the heterosphere contains gases that are layered by density.

When an atom loses an electron, it becomes a:

• positive ion

• negative ion

• neutral ion

• neutral atom

Which layer of the atmosphere is closest to Earth?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is the primary gas found in Earth's atmosphere?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Hydrogen

Which atmospheric layer is known for weather phenomena?

• Stratosphere

• Mesosphere

• Troposphere

• Exosphere

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

What is the main function of the ozone layer?

• To trap heat

• To block ultraviolet radiation

• To reflect radio waves

• To absorb carbon dioxide

In which layer do auroras occur?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere