Atmosphere

The atmosphere is _____.

• the layer in which weather occurs
• the layer that contains the ozone layer
• the layer of water in the oceans
• the layer of gases that surrounds Earth

Earth’s atmosphere is important to living things because it_____.

• contains dust and other particles
• is very thin compared to the size of Earth
• provides all the gases that living things need to survive
• maintains a constant relative humidity

Earth’s atmosphere traps energy from the sun, which _____.

• allows water to exist as a liquid
• allows solar radiation to penetrate to the surface
• allows ozone to form easily
• causes meteors to burn up

Photochemical smog results from the interaction of pollutants in the presence of _____.

• water vapor
• oxygen
• sunlight
• rainfall

The layer of our atmosphere in which weather occurs is the _____.

• troposphere
• stratosphere
• mesosphere
• exosphere

The ozone layer protects living things on Earth from _____.

• visible light
• infared rays
• ultraviolet radiation
• carbon dioxide

Which layer of the atmosphere protects Earth’s surface from being hit by most meteoroids?

• troposphere
• stratosphere
• mesosphere
• thermosphere

Heat from the sun reachers you by____________.

• conduction
• light emission
• convection
• radiation

As you rise upwards in the atmosphere, air pressure

• increases
• decreases
• doesn’t change
• first increase, then decreas

Heat transfer between two substances that are in contact is called _____.

• conduction
• thermal energy
• convection
• radiation