OCR B2 Revision Flashcards: Amy and Lacey - Sustainability

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Why is conservation important?
1: protect food supply. 2:prevent damage to food chains which can be hard to predict. 3:protect organisms that might be useful for medical purposes. 4: Protect organisms and habitats that people like to visit and study.
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What makes a species at risk of extinction?
If population, number of individuals or habitats fall below critical levels.
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What factors should we bear in mind when trying to conserve species?
Size of population (is there enough for genetic variation to occur so they can survive?), Number of suitable habitats available for the organism to live in and levels of competition from other species.
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Why do scientists think here is a need to kill some whales?
To research how whales can survive at extreme depths. However this can be done without killing the animal and tracking to find out about migration patterns and communication need the whale to be alive.
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What is sustainable development?
Taking enough resources from the environment for current needs eg fishing quotas are set so that there are enough fish to breed and woods are replanted to keep up the supply of trees.
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Why is it crucial to continue with sustainable development as world population increases?
Fossil fuels will run out so we need to seek out new fuels such as wood. We need to supply increasing amounts of food for a growing population without damaging habitats. Large amounts waste products must be disposed of to prevent/minimise pollution.
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Other cards in this set

Card 2

Front

What makes a species at risk of extinction?

Back

If population, number of individuals or habitats fall below critical levels.

Card 3

Front

What factors should we bear in mind when trying to conserve species?

Back

Preview of the front of card 3

Card 4

Front

Why do scientists think here is a need to kill some whales?

Back

Preview of the front of card 4

Card 5

Front

What is sustainable development?

Back

Preview of the front of card 5
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