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B7: Quiz 10 – Answers
B7: Quiz 10 – Answers
1)
a) Deforestation is the chopping down of trees to clear an area of land
b) Slash and burn is where a large area of forest is cut down, left to dry and then burnt
c)
i) The two reasons are:
d) Any two from growing cash crops, growing biofuels, palm oil, crops for food (rice), rearing cattle, resources for products (timber), city expansion, new roads etc.
e) Decrease in biodiversity
f) Lots of drugs are made from substances that are found in/ discovered from plants in forests. Deforestation may result in some plant species becoming extinct, which reduces our chances of finding new substances in plants that can be used in new drugs to treat illnesses
g) Any two from soil erosion, increased flood risk and soil becoming less fertile
h) Deforestation can provide jobs for locals and help the economy of a community/ country to grow
2)
a) The plants do not decompose/ break down properly because there is not enough oxygen for the decomposing microorganisms to respire as the peatbogs are waterlogged
b) Any two from cleared for farmland, burning peat as a fuel and used as a fertiliser/ compost for both farmers and gardeners
c) The burning of peatbogs produces carbon dioxide, which leads to the enhanced greenhouse effect/ climate change
d) The draining of peatbogs results in more oxygen in the peat, which means that there is plenty of oxygen available for the microorganisms to respire and breakdown/ decompose the peat. The respiring of the microorganisms produces carbon dioxide – carbon dioxide is a greenhouse gas that leads to the enhanced greenhouse effect/ climate change
e) The destroying of peatbogs reduces biodiversity as the vegetation, animals and microorganisms have no place to live after the peatbogs have been cleared.
a) Deforestation is the chopping down of trees to clear an area of land
b) Slash and burn is where a large area of forest is cut down, left to dry and then burnt
c)
i) The two reasons are:
- Deforestation produces carbon dioxide when it is cleared using the “slash and burn” technique or when it is chopped down and left to be broken down/ decomposed by microorganisms who respire.
- Deforestation reduces the number of trees and vegetation. Trees and vegetation undertake photosynthesis which takes carbon dioxide out of the atmosphere. If there are fewer trees and vegetation due to deforestation, less photosynthesis will happen, thus meaning that less carbon dioxide is taken out of the atmosphere.
d) Any two from growing cash crops, growing biofuels, palm oil, crops for food (rice), rearing cattle, resources for products (timber), city expansion, new roads etc.
e) Decrease in biodiversity
f) Lots of drugs are made from substances that are found in/ discovered from plants in forests. Deforestation may result in some plant species becoming extinct, which reduces our chances of finding new substances in plants that can be used in new drugs to treat illnesses
g) Any two from soil erosion, increased flood risk and soil becoming less fertile
h) Deforestation can provide jobs for locals and help the economy of a community/ country to grow
2)
a) The plants do not decompose/ break down properly because there is not enough oxygen for the decomposing microorganisms to respire as the peatbogs are waterlogged
b) Any two from cleared for farmland, burning peat as a fuel and used as a fertiliser/ compost for both farmers and gardeners
c) The burning of peatbogs produces carbon dioxide, which leads to the enhanced greenhouse effect/ climate change
d) The draining of peatbogs results in more oxygen in the peat, which means that there is plenty of oxygen available for the microorganisms to respire and breakdown/ decompose the peat. The respiring of the microorganisms produces carbon dioxide – carbon dioxide is a greenhouse gas that leads to the enhanced greenhouse effect/ climate change
e) The destroying of peatbogs reduces biodiversity as the vegetation, animals and microorganisms have no place to live after the peatbogs have been cleared.
Questions
1)
a) What is deforestation?
b) What is the “slash and burn” method of deforestation?
c)
i) Deforestation increases the amount of carbon dioxide in the atmosphere for two reasons; what are these two reasons?
ii) Why is an increase in the levels of carbon dioxide in the atmosphere an issue?
d) Give 2 uses of deforested land.
e) Does deforestation increase or decrease biodiversity?
f) Discuss the potential future medical implications of deforestation.
g) Other than the negatives discussed in the previous parts of this question, give two other negatives of deforestation.
h) Give a positive of deforestation.
2)
a) Why do dead plants not decompose in peatbogs?
b) Give 2 reasons why peatbogs are being cleared.
c) Explain why the clearing of peatbogs by burning them is an issue.
d) Explain why the clearing of peatbogs by draining them is an issue.
e) What effect does the clearing of peatbogs have on biodiversity?
1)
a) What is deforestation?
b) What is the “slash and burn” method of deforestation?
c)
i) Deforestation increases the amount of carbon dioxide in the atmosphere for two reasons; what are these two reasons?
ii) Why is an increase in the levels of carbon dioxide in the atmosphere an issue?
d) Give 2 uses of deforested land.
e) Does deforestation increase or decrease biodiversity?
f) Discuss the potential future medical implications of deforestation.
g) Other than the negatives discussed in the previous parts of this question, give two other negatives of deforestation.
h) Give a positive of deforestation.
2)
a) Why do dead plants not decompose in peatbogs?
b) Give 2 reasons why peatbogs are being cleared.
c) Explain why the clearing of peatbogs by burning them is an issue.
d) Explain why the clearing of peatbogs by draining them is an issue.
e) What effect does the clearing of peatbogs have on biodiversity?