EM SA1

Question 1

What does atmosphere mean?

Answer 1

The atmosphere, a mix of gases surrounding Earth, makes life possible by providing breathable air, shielding us from harmful UV radiation, and trapping heat to warm the planet.

Question 2

What are the different layers of the atmosphere(from lowest to highest)?

Answer 2

-Troposphere
-Stratosphere
-Mesosphere
-Thermosphere
-Exosphere

Question 3

What are the major components of air in the atmosphere?

Answer 3

-Nitrogen 78%
-Oxygen 21%
-Other gases 1%

Question 4

What is atmospheric pollution?

Answer 4

Atmospheric or air pollution is the presence of harmful gases/substances in the air, which can harm humans and the environment.

Question 5

What factors contribute to air pollution?

Answer 5

Emissions from factories, vehicle exhaust, natural sources like wildfires and volcanic eruptions, etc.

Question 6

What does ‘smog’ mean?

Answer 6

Smog is a combination of smoke and fog that lowers visibility and gives poor air quality.

Question 7

How is smog created?

Answer 7

Smog is the result of the reaction of emissions from cars, factories, and industries with the sunlight and atmosphere.

Question 8

Why is smog harmful to health?

Answer 8

When smog is inhaled, it may cause the following effects:
-Coughing
-Burning sensation in eyes and throat
-Risk of serious heart diseases
-Risk of serious lung diseases
-Dangerous for people with asthma

Question 9

What is human population?

Answer 9

Human population is the number of people in a specific area.

Question 10

What is the estimated population of the world as of 2024?

Answer 10

8.2 billion people

Question 11

What is population distribution?

Answer 11

Population distribution is the way people are distributed on the surface of the earth.

Question 12

What is population density and how is it calculated?

Answer 12

Population density is the ratio between the number of people to the area of the land. It is measured in person per square kilometer using this formula:
Density=Total Population/Total Land area

Question 13

What are the factors influencing the distribution of population?

Answer 13

*Geographical factors
-Water availability
-soil
-Climate
*Economic factors
-Industrialization
-Urbanization
-Minerals

Question 14

What regions of the earth are the most thinly populated?

Answer 14

The North and South poles.

Question 15

What is the coldest part of the atmosphere?

Answer 15

The mesosphere

Question 16

Where is acid rain more common?
rural areas urban areas

Answer 16

urban areas

Question 17

What is the full form of CFC?

Answer 17

Chlorofluorocarbon

Question 18

What is global warming?

Answer 18

Global warming is the phenomenon where it gradually heats up near the earth’s surface

Question 19

What are the strategies to reduce the impacts of acid rain?

Answer 19

-Reduce the emission of pollutant gases from industries
-Encourage the production and use of renewable energy
-Encourage the use of electrical vehicles
-Plant trees to absorb polluted air

Question 20

What are the strategies to control global warming?

Answer 20

-Reduce deforestation
-Planting more trees
-Increased dependence on renewable energy sources
-Reduce vehicle use