Characteristics and Layers of the Atmosphere

Which is the most common gas found in the air we breathe?

• Helium

• Nitrogen

• Oxygen

• Argon

Which is the second most common element found in the air we breathe?

• Helium

• Nitrogen

• Oxygen

• Argon

What does the amount of water vapor in the air NOT depend on?

• Season

• Time of day

• How much people drink

• Location

What is the difference between ozone and the oxygen we breathe?

• Ozone has two oxygen atoms, but the oxygen we breathe has three

• Ozone has three oxygen atoms, but the oxygen we breathe has two

What does the ozone do?

• Keeps meteors from hitting the earth

• Absorbs harmful UV radiation from the sun

• It is the air we breathe

• Controls wind patterns

Why is the ozone breaking down?

• Harmful chemicals (CFCs) released by refrigerators and air conditioners

• It has broken down naturally

• The greenhouse effect

• Raditation

Above which continent is the "hole" in the ozone primarily located?

• North America

• South America

• Australia

• Antarctica

Is the hole in the ozone permanent?

• No, but it hasn't begun to fix itself at all

• Yes, because we keep emitting CFCs

• No, because we've stopped emitting CFCs

• Yes, even though we no longer emit CFCs

What is the term used to describe tiny solid and liquid particles in the atmosphere, such as dust, volcanic ash, & pollen?

• Ozone

• Particulates

• CFCs

• Pollution

What holds the atmosphere in place?

• Air particles sticking to each other

• The sun

• The ozone

• Gravity