Structure & Composition of the Earth

Where you will find the ozone layer.

• stratosphere
• thermosphere
• exosphere
• mesosphere

In which layer does weather occur?

• stratosphere

• thermosphere

• troposphere

• mesosphere

The only layer that contains water vapor and carbon dioxide.

• stratosphere
• thermosphere
• troposphere
• mesosphere

The layer of the atmosphere where we live.

• stratosphere

• thermosphere

• troposphere

• mesosphere

The most common gas in the atmosphere (78%).

• Nitrogen
• Oxygen
• Carbon Dioxide
• Trace gases

What two gases are found throughout all layers of the atmosphere?

• Nitrogen and carbon dioxide
• Nitrogen and oxygen
• Oxygen and carbon dioxide
• Trace gases and water vapor

From the list below, what option best describes one of the purposes of the Earth's atmosphere?

• help to regulate the temperature on Earth

• Help UV rays to reach the Earth's surface

• Creates meteors in the sky

• Keep ocean waters cold

As you go higher in the troposphere, the temperature _______________.

• decreases
• increases
• stays the same

As you go higher in the stratosphere, the temperature _______________.

• decreases
• increases
• stays the same

In the Mesosphere, temperature _______________ with an increase in altitude or height.

• decreases

• increases

• stays the same