AQA Gcse Biology Additional Foundation Cards.

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What are fossils?
Fossils are the remains of organisms from many years ago, which are found in rocks.
1 of 7
State 3 ways that fossils can be formed.
-From gradual replacement by minerals. -From casts and impressions -From preservation in places where no decay happens.
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State 3 environmental factors which causes a species to become extinct.
Any 3 from; predators / disease / lack of food / competition / loss of habitat / climate change / catastrophic event – or volcanic eruption / flood / drought / temperature change / weather change / ice age / change in atmosphere
3 of 7
Define speciation.
Speciation is when a new species develops.
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Define isolation.
Isolation is where populations of a species are separated e.g. due to a physical barrier.
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How can fossils give evidence for evolution?
The fossils show change with time.
6 of 7
Why are scientists uncertain about how life began on Earth?
There is insufficient / no evidence to prove how life began on Earth.
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Other cards in this set

Card 2

Front

State 3 ways that fossils can be formed.

Back

-From gradual replacement by minerals. -From casts and impressions -From preservation in places where no decay happens.

Card 3

Front

State 3 environmental factors which causes a species to become extinct.

Back

Preview of the front of card 3

Card 4

Front

Define speciation.

Back

Preview of the front of card 4

Card 5

Front

Define isolation.

Back

Preview of the front of card 5
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