The Greenhouse Effect (34)

Question 1

What are the effects of combustion of fossil fuels?

Answer 1

More CO2 released than removed

CO2 increasing

Question 2

What are the effects of cutting down forests?

Answer 2

Fewer photosynthesis, less CO2 removed

Question 3

Why should burning of trees be decreased?

Answer 3

More carbon dioxide is released, less trees to photosynthesise.

Question 4

How can decomposing bacteria contribute to the increase of CO2?

Answer 4

More CO2 is released during respiration.

Question 5

How does the greenhouse effect work?

Answer 5

• incoming short wave radiation from sun reaches Earth. Absorbed by oceans, plants, Earth’s surface which heats up.
• Surface cools down, giving off long-wave radiation. Some is trapped be certain gasses in Earth’s atmosphere, not all escapes to outer space.
• called greenhouse gasses, trapping heat close to the earth’s surface.

Question 6

Greenhouse gasses?

Answer 6

CO2, methane, CFC’s, nitrous oxide.

Question 7

What is global warming?

Answer 7

Due to human activities that emit greenhouse gasses at a very high rate in the atmosphere, there is an excess build-up of these gasses in the atmosphere. This results in a greater amount of heat being trapped and sent back to Earth by these gasses, and therefor, the Earth’s temperature is rising.

Question 8

Give 7 negative results of global warming.

Answer 8

Heat waves
Violent storms
Polar ice-caps are melting
Climatic changes
A change in sea temperatures
Changes in world weather patterns
More evaporation of water