Science Year 8 revision

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  • Created by: lucray
  • Created on: 17-05-15 16:47
What carries blood to the heart/ away from the heart?
Veins carry de-oxygenated blood to the heart and arteries carry oxygenated blood away from the heart.
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Where does respiration happen?
In the mitochondria
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What is resistance?
How hard it is for electricity to flow
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What is electrical current?
Tiny particles called electrons flowing through wires.
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What is an element?
A substance that cannot be split up into anything simpler by chemical reactions
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What is a compound?
Substances that can be split up into simpler substances. They contain the atoms of two or more element joined together by bonds.
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Where does photosynthesis take place?
In chloroplasts that contain chlorophyll
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what is the name of the holes that let carbon dioxide and oxygen leave/ enter through?
Stomata
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Name two types of characteristics?
Inherited and environmental
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What is a hybrid?
The off spring when two animals of different species reproduce
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How man chromosomes do gamete cells have?
Half the amount that the rest of the animal's cells have
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What is selective breeding?
When a breeder only breeds the animals with a specific quality they want their animal to have
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What is genetic modification?
Genetic modification is when scientists in labs alter the genes in living organisms or a genes to a different species.
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How do you calculate the mean speed?
distance travelled/time taken
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Other cards in this set

Card 2

Front

Where does respiration happen?

Back

In the mitochondria

Card 3

Front

What is resistance?

Back

Preview of the front of card 3

Card 4

Front

What is electrical current?

Back

Preview of the front of card 4

Card 5

Front

What is an element?

Back

Preview of the front of card 5
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