Atmosphere, Water and Global Change

What is the primary component of Earth's atmosphere?

• Oxygen

• Carbon dioxide

• Nitrogen

• Argon

Approximately what percentage of Earth's atmosphere is oxygen?

• 78%

• 20.95%

• 0.93%

• 1%

What is the primary role of the mixture of gases known as air in the Earth's atmosphere?

• To provide oxygen for combustion

• To protect life by absorbing ultraviolet radiation and reducing temperature extremes

• To facilitate sound travel

• To enable flight for birds and planes

Where does weather primarily occur in the Earth's atmosphere?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

Which statement best describes the atmosphere of Earth?

• It is static and unchanging

• It is composed solely of oxygen and nitrogen

• It is dynamic, influenced by factors like sunlight and Earth's spin

• It is primarily liquid and covers the Earth's surface

What is the outermost layer of Earth's atmosphere called?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

What causes the air in the atmosphere to move?

• Gravitational pull of the moon

• Rotation of the Moon

• Heating from the Sun

• Magnetic fields of the Earth

What is the result of the Earth's rotation on atmospheric movement?

• It has no significant effect

• It stops the movement of air

• It causes the air to move in a straight line

• It breaks the movement into three distinct air cells in each hemisphere

Which air cells are identified near the equator?

• Polar cells

• Ferrel cells

• Hadley cells

• None of the above

At what latitude do the Ferrel cells primarily occur?

• A) 0° N

• B) 30° N

• C) 60° N

• D) 90° N