Unit 1 and 2 virtual Test

What phase of the moon is it?

• New moon

• Full moon

• First quarter

• Third quarter

In what layer of the atmosphere do polar auroras occur?

• Exosphere

• Thermosphere

• Stratosphere

• Mesosphere

In what layer of the atmosphere do we find the ozone layer?

• Exosphere

• Thermosphere

• Stratosphere

• Mesosphere

From Earth´s surface to an altitude of around 12km and contains most of atmosphere´s air

What layer of the atmosphere is it?

• Thermosphere

• Troposphere

• Stratosphere

• Mesosphere

Composition of Earth´s atmosphere

• 71% N2

  28% O2

  1% Others

• 50% N2

  50% O2

• 78% Others

  21% O2

  1% N2

• 78% N2

  21% O2

  1% Others

What is the main cause of the destruction of the ozone layer?

• Carbon dioxide (CO₂)

• Chlorofluorocarbons (CFCs)

• Methane

• Oxygen

What is the function of the ozone layer?

• Reflects sunlight

• Protects Earth from harmful UV radiation

• Produces rain

• Traps greenhouse gases

Which pollutant is mainly responsible for acid rain?

• Nitrogen

• Oxygen

• Sulfur dioxide and nitrogen oxides

• Water vapor

What is the enhanced greenhouse effect?

• Reduction of greenhouse gases

• Natural warming of Earth

• Cooling of the atmosphere

• Increase in greenhouse gases caused by humans

What is smog?

• Acid rain cloud

• Smoke from cars

• A mixture of smoke and fog caused by pollution

• Greenhouse effect