Lesson-3 Impact on Atmosphere - Grade 6 Am.

1. The percentage of Nitrogen gas in the air is:

• 21%

• 1%

• 42%

• 78%

1. Which sentence is correct about greenhouse gases:

• Are gases in the atmosphere that trap heat energy from the sun.

• Are found in the atmosphere in high percentage

• Examples of greenhouse gases: CO₂ and methane gas.

• both option 1 and 3

1. What is the difference between ozone gas and oxygen gas?

• Ozone gas is made up of 3 atoms of oxygen, while oxygen gas is made up of 2 atoms of oxygen.

• Ozone is harmful in the upper and lower atmosphere, while oxygen is useful

• Ozone gas is inhaled by animals while oxygen gas is inhaled by human

which kind of energy is produced from the inner layer of the earth(the core):

• Chemical energy

• Geothermal energy

• Solar energy

• Electromagnetic energy

what is the source of particulate matter?

• Volcanic eruptions and forest fires.

• Burning of fossil fuels in vehicles

• Burning fossil fuel in power stations

• All of the above

Is a law in united states that sets limits on the amount on certain pollutants that can be released to the air

• Clean air act

• Air pollution

Is the heat that comes from inside the earth that can be used for generating electricity

• Hybrid cars

• CFCs

• Geothermal energy

Snow or rain that has PH less than 5.6

• CFCs

• Acid precipitation

• The Montreal Protocol

One of the following is not from the resources of sulfur emissions

• marshes

• Burning fossil fuel

• revers

• Volcanoes

--------- is a protective layer of ozone gas, found in the upper part of the atmosphere and protect living things from harmful U.V rays

• Vertical forests

• Ozone layer