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- 1. Multiple Choice
Variations in solar output:
When the number of sunspots increases, the amount of solar radiation reaching Earth will _____, thus _____ will happen.
increase...global warming
increase...global cooling
decrease...global cooling
decrease...global warming
- 2. Multiple Choice
Volcanic eruptions:
Volcanic eruptions can cause _____ as ...
global cooling...ash clouds and sulphur-based particles reflect incoming solar radiation back to space.
global warming...extremely hot lava and superheated gases in pyroclastic flows heat up the atmosphere.
- 3. Multiple Choice
Global cooling caused by volcanic eruptions is a long-term impact.
True
False
- 4. Multiple Choice
Which of these are greenhouse gases? You may select more than one option.
Carbon dioxide
Carbon monoxide
Methane
Nitrous oxide
Oxygen
- 5. Multiple Choice
Which of these are greenhouse gases? You may select more than one option.
Sulphur dioxide
Water vapour
Chlorofluorocarbons (CFCs)
Hydrogen
Helium
- 6. Multiple Choice
The enhanced greenhouse effect happens when...
the concentration of greenhouse gases in the atmosphere increases.
the concentration of greenhouse gases in the atmosphere decreases.
the concentration of greenhouse gases in the atmosphere stays constant.
the concentration of greenhouse gases in the atmosphere fluctuates.
- 7. Multiple Choice
The enhanced greenhouse effect leads to ___.
global cooling
global warming
global dimming
- 8. Multiple Choice
Which of the following is the main cause of the enhanced greenhouse effect?
Increase in sunspots
Volcanic eruptions
Human activities that emit greenhouse gases
- 9. Multiple Choice
What do anthropogenic factors refer to?
Factors caused by human activities
Factors caused by nature
Factors caused by scientific processes
Factors caused by solar activity
- 10. Multiple Choice
Which of these are anthropogenic factors that cause the enhanced greenhouse effect? You may select more than one option.
Burning of fossil fuels
Deforestation
Reforestation
Urbanisation
Industrialisation
- 11. Multiple Choice
The burning of fossil fuels to provide energy for human activities is the _____ contributor of greenhouse gases because _____.
highest...they have very high carbon content, so they release huge amounts of carbon dioxide when burnt.
highest...they produce high amounts of heat and smoke that will warm the atmosphere when burnt.
lowest...they release carbon dioxide into the atmosphere very slowly when burnt.
lowest...most countries around the world do not use fossil fuels for human activities anymore.
- 12. Multiple Choice
How does deforestation cause the enhanced greenhouse effect? You may select more than one option.
Fewer plants to absorb carbon dioxide from the atmosphere.
Soil gets exposed to sunlight which will increase soil temperature. Thun carbon oxidation in soil will release carbon dioxide into the atmosphere.
Fewer plants to give out oxygen to cool the atmosphere.
Fewer plants to give out water vapour that will form clouds in the atmosphere to reflect incoming solar radiation.
- 13. Multiple Choice
How does agriculture cause the enhanced greenhouse effect? You may select more than one option.
Farm machinery run on fossil fuels which release carbon dioxide.
Methane is released from decomposing matter in wet rice fields.
Growing demand for beef products around the world leads to more intense cattle farming. More methane is released by cattle such as cows.
More nitrous oxide is released from soil as inorganic fertilizers are used to boost the growth of crops.
- 14. Multiple Choice
Which of these explain how urbanisation causes the enhanced greenhouse effect? You may select more than one option.
More people live in urban areas such as cities and towns. Hence, more forested areas are cleared to develop cities.
Deforestation happens for urbanisation to take place, so there are fewer plants to give out oxygen for people to breathe.
More fossil fuels are burnt to provide energy for human activities that need machines and transport.
Fewer people live in rural areas such as villages and agricultural areas in the outskirts of a country (a.k.a. countryside).
- 15. Multiple Choice
How do industries cause the enhanced greenhouse effect? You may select more than one option.
Production of goods and services need machines which in turn run on fossil fuels.
Deforestation takes place to clear land for more factories and infrastructure to be built for industries.
More vehicles are used to transport goods and services to meet the needs of consumers.
Advanced technology is being used by some industries to reduce carbon dioxide emissions.
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