Human Influences on the Environment

IGCSE Biology review of human influences on the environment

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  • Created by: Iona Lane
  • Created on: 27-05-11 11:28
___ _________ is a compound which destroys or controls any organism which is considered to be harmful to our interests
A pesticide
1 of 17
___ ____________ destroys or controls populations of insects, preferably only those thought to be
An insecticide
2 of 17
Many agricultural features are controlled by farmers to increase crop yield. Soil ions (eg. nitrates) by adding fertilisers because
extra minerals can be taken up and used by the plant to make proteins and other compounds for growth
3 of 17
Many agricultural features are controlled by farmers to increase crop yield. Soil pH is controlled by adding lime to acidic soils because
an unsuitable soil pH can affect crop growth as it reduces the uptake of mineral ions
4 of 17
Many agricultural features are controlled by farmers to increase crop yield. Carbon dioxide, light and heat can be controlled in greenhouses to maximise the yield of crops as
they influence the rate of photosynthesis and so influence the production of the organic substances needed for growth
5 of 17
There are two types of fertilisers; organic and inorganic. An example of an organic fertiliser is
farmyard manure
6 of 17
There are two types of fertilisers; organic and inorganic. An example of an inorganic fertiliser is
ammonium nitrate
7 of 17
Eutrophication is
increasing the nutrients in water resulting in an increase in the population of algae
8 of 17
Deforestation is
damage to soil structure by overgrazing and cutting down trees
9 of 17
Overfishing is
removing stock until species have been decreased to virtually nothing
10 of 17
Acid rain is
increasing gases in the air which dissolve in water to change the pH
11 of 17
Global warming is
increasing the overall temperature of the earth
12 of 17
There are many ways of reducing the effects of pollution. Global warming can be reduced by
use as little energy as possible and invest in alternative energy sources (renewable)
13 of 17
There are many ways of reducing the effects of pollution. Acid rain can be reduced by
reduce the use of private transport and reduce the use of electricity
14 of 17
There are many ways of reducing the effects of pollution. Organic pollution of water can be reduced by
farmers making safer use of organic farming practices
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There are many ways of reducing the effects of pollution. Nitrate pollution of water can be reduced by
farmers making more use of organic farming practices
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There are many ways of reducing the effects of pollution. Pesticide pollution of soils can be reduced by
farmers can reduce the use of pesticides and use biological control of pests
17 of 17

Other cards in this set

Card 2

Front

___ ____________ destroys or controls populations of insects, preferably only those thought to be

Back

An insecticide

Card 3

Front

Many agricultural features are controlled by farmers to increase crop yield. Soil ions (eg. nitrates) by adding fertilisers because

Back

Preview of the front of card 3

Card 4

Front

Many agricultural features are controlled by farmers to increase crop yield. Soil pH is controlled by adding lime to acidic soils because

Back

Preview of the front of card 4

Card 5

Front

Many agricultural features are controlled by farmers to increase crop yield. Carbon dioxide, light and heat can be controlled in greenhouses to maximise the yield of crops as

Back

Preview of the front of card 5
View more cards

Comments

Callum Pullen

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well this is enlightening

Chris

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*EutropHication

*Ensure

Swallowtail

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A long challenging quiz on human influences on the environment. Try the quiz after you have revised this section and then look up the answers to any questions you get wrong. (If any).

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