6- Atmosphere

What happens to air pressure and the amount of oxygen as the altitude increases in Earth’s atmosphere?

• Both air pressure and the amount of oxygen decrease.

• Air pressure increases, while the amount of oxygen decreases.

• Air pressure decreases, while the amount of oxygen increases.

  Air pressure decreases, while the amount of oxygen increases.

• Both air pressure and the amount of oxygen increase.

In which layer of Earth’s atmosphere does weather occur?

• troposphere

• stratosphere

• mesosphere

• thermosphere

Which describes the important role of the ozone layer?

• It absorbs harmful ultraviolet radiation.

• It prevents the air from getting thinner.

• It increases the oxygen level.

• It protects the surface from extreme weather.

How did the Industrial Revolution contribute to global climate change?

• It led to an increased use of coal, oil, and other fossil fuels.

  It led to an increased use of coal, oil, and other fossil fuels.

• It led to the development of nonrenewable sources of energy.

• It led to the release of chemicals that destroyed the ozone layer.

• It led to an increased use of alternative fuels other than fossil fuels.

Which best describes global warming?

• It is the increase in Earth’s average surface temperature due to human activity.

• It is the changes to Earth’s climate due to increased temperature.

• It is the day-to-day changes in temperature, precipitation, wind, and humidity.

  It is the day-to-day changes in temperature, precipitation, wind, and humidity.

• It is the trapping of heat energy due to the addition of carbon dioxide in the atmosphere.

  It is the trapping of heat energy due to the addition of carbon dioxide in the atmosphere.

Which action would help reduce global warming?

• Use more fuel-efficient cars.

• Use more plastic products.

• Use more electricity.

• Use more paper products.

  Use more paper products.

Which compares the gases released by fertilizers and gases from landfills?

• Chemicals from fertilizers can release nitrous oxide, while landfills release methane.

• Chemicals from fertilizers can release methane, while landfills release carbon dioxide.

• Chemicals from fertilizers can release carbon dioxide, while landfills release methane.

• Chemicals from fertilizers can release methane, while landfills release nitrous oxide.

Why does clearing forests using fire contribute to the greenhouse effect?

• Burning trees returns stored carbon to the atmosphere as carbon dioxide.

• Burning trees returns stored nitrogen to the atmosphere as nitrous oxide.

• Burning trees returns stored oxygen to the atmosphere as a gas.

• Burning trees returns stored methane to the atmosphere as a gas.

  Burning trees returns stored methane to the atmosphere as a gas.

What is the main reason why raising cattle contributes to global warming?

• Cattle store nitrogen, which is released as nitrous oxide as they die.

  Cattle have microbes in their stomach that produce methane during digestion.

• Cattle store nitrogen, which is released as nitrous oxide as they die.

• Cattle eat grass, which reduces the amount of plants that remove atmospheric carbon dioxide.

• Cattle release carbon dioxide as they breathe, similar to humans.

Why do scientists believe that winters might be milder on the Eastern Seaboard in the future?

• A change in the amount of polar ice will alter how ocean currents move.

• A change in the amount of polar ice will make cold water stay at the poles, warming up the land.

  A change in the amount of polar ice will make cold water stay at the poles, warming up the land.

• A change in the amount of polar ice will pull heat from the Eastern Seaboard.

• A change in the amount of polar ice will reflect more sunlight toward the Eastern Seaboard.