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Biology Quiz - Unit 3 - Deforestation (Questions)

GCSE Biology explores deforestation and its impacts, from habitat loss and extinctions to increased carbon dioxide levels that affect global warming and climate change.

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Fascinating Fact:

Sustainable forest management involves controlled logging, replanting trees and protecting key areas. This aims to balance resource use with conservation.

In GCSE Biology, deforestation is studied as the large-scale removal of forests for farming, timber and development. You examine how this changes habitats, disrupts food webs and alters the carbon cycle.

Key Terms

  • Deforestation: The large-scale cutting down or clearing of forests, usually by humans, often to create land for farming or settlements.
  • Biodiversity: The variety of different species of plants, animals and microorganisms living in a particular habitat or across the whole planet.
  • Reforestation: Planting trees on land where forest has been removed, helping to restore habitats and absorb carbon dioxide from the atmosphere.

Frequently Asked Questions (click to see answers)

What is deforestation in GCSE Biology?

In GCSE Biology, deforestation is the removal of large areas of forest by humans. It is usually linked to agriculture, logging or development and can damage habitats and the carbon cycle.

How does deforestation affect biodiversity?

Deforestation reduces biodiversity because many species lose their habitats and food sources. Some populations decline or become extinct when forests are cleared or broken into small, isolated patches.

How can the impacts of deforestation be reduced?

The impacts of deforestation can be reduced by limiting tree cutting, replanting trees, protecting wildlife-rich areas and using resources like timber more efficiently and responsibly.

Try These Related Quizzes

1. What is deforestation?
[ ] Removal of carbon dioxide
[ ] Removal of water
[ ] Removal of trees
[ ] Removal of plants
2. Slash and burn releases which gas into the atmosphere?
[ ] Carbon monoxide
[ ] Ozone
[ ] Carbon dioxide
[ ] Carbon
3. One reason for deforestation is to provide...
[ ] timber
[ ] waste
[ ] clean water
[ ] fire
4. Deforestation makes global warming worse because...
[ ] the trees have all gone
[ ] the trees would have taken up carbon dioxide
[ ] the trees would have given off oxygen
[ ] there are still plenty of trees left
5. Burning trees contributes to global warming because...
[ ] combustion releases carbon dioxide
[ ] combustion needs oxygen
[ ] the trees die
[ ] there are more rice fields
6. If peat bogs are removed, this can increase...
[ ] ozone levels
[ ] carbon dioxide levels
[ ] oxygen
[ ] water vapour
7. Deforestation leading to increased cattle farming also increases global warming because of the release of which greenhouse gas?
[ ] Oxygen
[ ] Nitrogen
[ ] Ammonia
[ ] Methane
8. Greenhouse gases can increase the temperature of the Earth by...
[ ] trapping heat in the atmosphere
[ ] increasing heat radiation
[ ] disappearing during the day
[ ] letting go of heat at night
9. Global warming can lead to...
[ ] deforestation
[ ] climate change
[ ] new species
[ ] an ice age
10. Deforestation leads to what change in biodiversity?
[ ] A decrease in biodiversity
[ ] An increase in biodiversity
[ ] No change in biodiversity over many years
[ ] A decrease in biodiversity, followed by an increase

You can find more about this topic by visiting BBC Bitesize - Biodiversity and the effect of human interaction on ecosystems

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Biology Quiz - Unit 3 - Deforestation (Answers)
1. What is deforestation?
[ ] Removal of carbon dioxide
[ ] Removal of water
[x] Removal of trees
[ ] Removal of plants
Sustainable forestry avoids deforestation as new trees are planted to replace those cut down
2. Slash and burn releases which gas into the atmosphere?
[ ] Carbon monoxide
[ ] Ozone
[x] Carbon dioxide
[ ] Carbon
This carbon dioxide comes from the combustion of carbon compounds in the trees. Oxidation of carbon produces carbon dioxide
3. One reason for deforestation is to provide...
[x] timber
[ ] waste
[ ] clean water
[ ] fire
Timber is another word for wood
4. Deforestation makes global warming worse because...
[ ] the trees have all gone
[x] the trees would have taken up carbon dioxide
[ ] the trees would have given off oxygen
[ ] there are still plenty of trees left
Fewer forests means that there is less photosynthesis and so less carbon dioxide is removed from the air
5. Burning trees contributes to global warming because...
[x] combustion releases carbon dioxide
[ ] combustion needs oxygen
[ ] the trees die
[ ] there are more rice fields
This is a greenhouse gas. Greenhouse gases trap heat in the Earth's atmosphere making it warmer than it would be without them. This means that there is more energy available to power wind and other weather phenomena
6. If peat bogs are removed, this can increase...
[ ] ozone levels
[x] carbon dioxide levels
[ ] oxygen
[ ] water vapour
Destroying the peat bogs in order to build on them will reduce the uptake of carbon dioxide, leading to its build up in the atmosphere. Many gardeners now choose to use peat-free compost products in their gardens and greenhouses
7. Deforestation leading to increased cattle farming also increases global warming because of the release of which greenhouse gas?
[ ] Oxygen
[ ] Nitrogen
[ ] Ammonia
[x] Methane
Cattle let off methane gas!
8. Greenhouse gases can increase the temperature of the Earth by...
[x] trapping heat in the atmosphere
[ ] increasing heat radiation
[ ] disappearing during the day
[ ] letting go of heat at night
Warmer conditions may sound pleasant but it's not as simple as that. Deserts will grow larger meaning there is less area for growing food crops and weather patterns will change as there is more energy in the atmosphere
9. Global warming can lead to...
[ ] deforestation
[x] climate change
[ ] new species
[ ] an ice age
Some areas like the British Isles will have more rainfall and high winds. Other places will have less rainfall, turning them into deserts
10. Deforestation leads to what change in biodiversity?
[x] A decrease in biodiversity
[ ] An increase in biodiversity
[ ] No change in biodiversity over many years
[ ] A decrease in biodiversity, followed by an increase
For a given area, biodiversity is a measure of the population size, number of species of animals and plants as well as the genetic variation within each species living there, the differences between species and the differences between ecosystems and habitats. If trees are removed, there are fewer habitats for plants and animals leading to a decrease in biodiversity
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