Atmosphere

Energy travels through space to Earth in the form of ____________________ waves.

• Radiation

• Gamma

• Electromagnetic

• X-Rays

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

Scientists divide Earth’s atmosphere into four main layers, classified according to changes in ____________________.

• Density

• Altitude

• Pressure

• Temperature

The ozone layer protects living things on Earth from

• visible light

• infrared rays

• ultraviolet radiation

• carbon dioxide

The layer of our atmosphere in which weather occurs is the

• troposphere

• stratosphere

• mesosphere

• exosphere

The ____________________ is the second layer of the atmosphere and contains the ozone layer.

• troposphere

• stratosphere

• thermosphere

• mesosphere

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

• troposphere

• stratosphere

• thermosphere

• mesosphere

The ________________ is the outermost layer of the atmosphere which extends outward into space and is divided into the ionosphere and the exosphere.

• troposphere

• mesosphere

• thermosphere

• stratosphere

The atmospheric gas called ____________ forms clouds when it condenses.

• rain

• evaporation

• water vapor

• oxygen

_________ can form when water in the air mixes with sulfur oxides to form sulfuric acid.

• rain

• water vapor

• acid rain

• evaporation