a drug that increases the activity of the nervous system
14 of 29
what is a depressant?
a drug which decreases the activity of the nervous system
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what are the side effects of solvents?
hallucinations and they can have a very serious effect on the body and personality
16 of 29
what does the air contain?
78% nitrogen, 20% oxygen, 0.04% carbon dioxide
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what can UV rays increase the risk of?
cancer such as skin cancer
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what is responsible for most of the fossil fuel burning?
power stations and cars
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what are the results of burning fossil fuels?
products are carbon dioxide, sulfur dioxide and oxides of nitrogen
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what does carbon dioxide cause?
acid rain and the greenhouse effect
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what is the greenhouse effect?
where the temperature of the earth increases
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what are the effects of global warming?
changes in weather patterns such as droughts and flooding and polar ice caps melting which increases sea levels
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what are the effects of acid rain?
has effects on the ecosystems, kills trees, damages buildings made from limestone, makes rivers and lakes more acidic which will kill fish
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what can we do to prevent acid rain?
use less fossil fuels, remove the gases which are given off from burning fossil fuels by removing them before them get into the atmosphere, use catalytic converters in car engines
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what is intensive farming?
a modern way of farming which has increased efficiency
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how does intensive farming effect animals?
food chains are damaged by the amount of pesticides used to kill animals that could damage crops, strain can be placed upon domestic animals so they produce as much food as possible
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what is organic farming?
traditional farming practices
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what are the three main areas used in organic techniques?
organic fertilisers, 'set- side' by using reforestation, biological pest control (using natural preditors to kill pests)
29 of 29
Other cards in this set
Card 2
Front
what does the nucleus do?
Back
controls the cell activities and contains all of the cell information
Card 3
Front
where do you find chlorophyll and what is it used for?
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