Earth's Atmosphere

The atmosphere is held in place due to________.

• Force

• Friction

• Gravity

• Density

The layer of gases surrounding the Earth.

• Biosphere

• Atmosphere

• Hydrosphere

• Cryosphere

The atmosphere protects life on Earth by absorbing __________ from the sun.

• Visible Rays

• Radio Waves

• Microwaves

• Ultraviolet Rays

The atmosphere warms the surface by the ___________ Effect

• Greenhouse

• Conduction

• Convection

• Radiation

The atmosphere reduces temperature ________ between day and night.

• increases

• extremes

• decreases

• records

What percentage of the atmosphere is Nitrogen?

• 100%

• 78%

• 21%

• 1%

What percentage of the atmosphere is Oxygen?

• 100%

• 78%

• 21%

• 1%

What percentage of the atmosphere counts for "all other gases" ?

• 100%

• 78%

• 21%

• 1%

The most abundant gas in Earth's atmosphere is____.

• Oxygen

• Argon

• Nitrogen

• Water Vapor

Which gas is unique to Earth?

• Oxygen

• Nitrogen

• Argon

• Carbon Dioxide