Atmosphere

What % of the atmosphere is Oxygen?

• 15%

• 21%

• 75%

• 50%

What % of the atmosphere is Nitrogen?

• 15

• 21

• 50

• 75

What is relative humidity?

• A current based on density

• a ratio of how much water vapor is in the air compared to how much it can hold

• water vapor

• cold air trapped at the surface of the Earth

What is the lowest layer of the atmosphere? (closest to Earth)

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What device helps remove pollutants from a factory's smokestack?

• catalytic converter

• CFCs

• scrubber

• smog filter

What is the purpose of the ozone layer?

• To clean the atmosphere

• Filter out pollutants in acid rain

• It is necessary for living things to breathe

• Protection from UV rays

What was the main cause of ozone depletion?

• Acid rain

• CFCs

• burning of fossil fuels

• smog

What are the 3 types of heat transfer?

• Radiation, Conduction and Convection

• UV rays, conduction and wind systems

• Convection, density differences and radiation

• CFCs, Conduction, Wind

What is a front?

• boundary between 2 air masses

• air with similar properties

• current due to differences in density

• the boundary between layers in the atmosphere

Substances released into the atmosphere are called ___.

• scrubbers

• fossil fuels

• bad air

• emissions