Atmosphere Review

The atmosphere as depicted in the image is:

• calm and serene

• chaotic and stormy

• bright and sunny

• dark and gloomy

What percentage of the atmosphere is made up of Nitrogen?

• 78%

• 21%

• 1%

• 0.03%

Which gas makes up 20.9% of the atmosphere?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Argon

What is the percentage of Argon in the atmosphere?

• 0.93%

• 1.5%

• 0.5%

• 2%

Which of the following gases is present in trace amounts in the atmosphere?

• Nitrogen

• Oxygen

• Argon

• CO2

What needs to happen to the nitrogen we breathe before it can be used by our bodies?

• It needs to be converted by nitrogen-fixing bacteria in the soil.

• It needs to be absorbed directly by our lungs.

• It needs to be converted by sunlight.

• It needs to be dissolved in water.

Scientists think the composition of the atmosphere has changed in which of the following ways?

• Increased levels of carbon dioxide and other greenhouse gases

• Decreased levels of oxygen

• Increased levels of nitrogen

• Decreased levels of argon

Pressure is a measure of ______ that acts over a certain area.

• force

• temperature

• volume

• density

What is a barometer?

• A tool that measures air pressure

• A device to measure temperature

• An instrument to measure humidity

• A gadget to measure wind speed

What causes air to be pulled down towards Earth's surface?

• Wind

• Gravity

• Temperature

• Humidity