Earth's Atmosphere

What percentage of our atmosphere is made up of oxygen?

• 78%

• 21%

• 45%

• 55%

What does the prefix tropos mean?

• Layer

• Outside

• Change

• Troops

Where you will find the ozone layer.

• stratosphere
• thermosphere
• exosphere
• mesosphere

Where weather occurs.

• stratosphere
• thermosphere
• troposphere
• mesosphere

The hottest layer.

• troposphere
• thermosphere
• exosphere
• mesosphere

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

• Nitrogen
• Oxygen
• Carbon Dioxide
• Trace gases

What does this diagram illustrate?

• Ozone Layer
• The Greenhouse Effect
• Ultraviolet Radiation
• Layers of the atmosphere

True or False? Air has no mass.

• True
• False

What is the correct order of earth's atmospheric layers from bottom to top?

• Stratosphere, Mesosphere, Troposphere, Thermosphere, Exosphere.
• Stratosphere, Troposphere, Mesosphere, Thermosphere, Exosphere.
• Stratosphere, Troposphere, Thermosphere, Mesosphere, Exosphere.
• Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere.

Directly above the troposphere is the _________.

• stratosphere
• mesosphere
• exosphere
• thermosphere