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what does a plant cell have that an animal cell doesn't?
cell wall, vacuole and chloroplast
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what does the nucleus do?
controls the cell activities and contains all of the cell information
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where do you find chlorophyll and what is it used for?
in the chloroplast and it is used for photosynthesis
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what is a living plant or animal cell called?
organism
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what is an organ made up of?
a collection of different tissues grouped together
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what is tissue made up of?
a group of the same type of cells
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what are the 7 characteristics of life?
movement, respiration, sensitivity, growth, reproduction, excretion, nutrition
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what is osmosis?
a special kind of diffusion which keeps us alive
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what does osmosis involve?
only water
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what does selectively permeable mean?
it only lets through small molecules of water
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what is a drug?
a chemical which has an effect on your body
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what are some examples of 'street' drugs?
cannabis, cocaine, heroin
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drug dependence has 2 features. what are they?
chemical dependence, psychological dependence
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what is a stimulant?
a drug that increases the activity of the nervous system
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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
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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)
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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?

Back

Preview of the front of card 3

Card 4

Front

what is a living plant or animal cell called?

Back

Preview of the front of card 4

Card 5

Front

what is an organ made up of?

Back

Preview of the front of card 5
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