Earth's Atmosphere

What is the layer of the atmosphere where weather occurs?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

How many layers is the atmosphere divided into?

• 2

• 3

• 4 or 5

• 6

What is the main gas found in the Earth's atmosphere?

• Oxygen (approximately 21%)

• Carbon Dioxide (approximately 0.04%)

• Nitrogen (approximately 78%)

• Argon (approximately 0.93%)

What happens to the temperature as altitude increases in the Troposphere?

• The temperature increases.

• The temperature remains constant.

• The temperature decreases.

• The temperature fluctuates unpredictably.

What is the primary source of energy for the Earth's atmosphere?

• The Moon

• Volcanic activity

• The Sun

• Ocean currents

What is the composition of the atmosphere?

• Mainly nitrogen (78%), oxygen (21%), and trace gases.

• Carbon dioxide (0.04%), oxygen (21%), and hydrogen (0.01%).

• Nitrogen (50%), oxygen (30%), and argon (20%).

• Oxygen (60%), nitrogen (30%), and carbon dioxide (10%).

What is the lowest layer of the atmosphere called?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

What is the temperature trend in the stratosphere?

• Temperature decreases with altitude.

• Temperature remains constant with altitude.

• Temperature increases with altitude.

• Temperature fluctuates randomly with altitude.

What is the boundary between the troposphere and the stratosphere called?

• Tropopause

• Stratopause

• Mesopause

• Thermopause

What is the role of the ozone layer?

• To absorb and protect against harmful ultraviolet (UV) radiation from the sun.

• To provide oxygen for breathing.

• To regulate the Earth's temperature.

• To block all forms of radiation from the sun.