Earth Atmosphere

The lowest layer of the atmosphere, this is also where weather occurs.

• Exosphere
• Mesosphere
• Troposphere
• Stratosphere

Air is composed of 78% of this element.

• Carbon Dioxide
• Nitrogen
• Oxygen
• Water Vapor

Air is composed of 21% of this element.

• Carbon Dioxide
• Nitrogen
• Oxygen
• Water Vapor

The ______________ in the stratosphere protects us from harmful UV rays.

• aurora
• weather
• convection currents
• ozone layer

When warm air rises and cools high in the atmosphere, and then sinks to the earth, this creates ____________ currents.

• Convection
• Surface
• Deep
• Precipitation

What layer of the atmosphere is the aurora located?

• Exosphere
• Thermosphere
• Stratosphere
• Mesosphere

What is the layer of the atmosphere in which meteors will burn up?

• Thermosphere
• Mesosphere
• Stratosphere
• Troposphere

This process keeps Earth's temperature suitable for life.

• Convection Currents
• Albedo Effect
• Greenhouse Effect
• Water Cycle

The result of a column of air pushing down on an area is known as

• Pollutants
• Atmosphere
• Air Pressure
• Altitude

Elevation or distance above sea level is known as

• Altitude
• Pollutants
• Barometer
• Atmosphere