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OCR 12st Century science:
part two
Hayley…read more

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Theory of evolution…read more

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How did life start?
· The earth is about 4500 million years old
· There is evidence that living creatures lived on
the earth from about 3500 years ago
· No one was there to record how life began
· The earth was hotter and the atmosphere was
mainly made up of carbon dioxide…read more

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· The main theory is that living creatures came
from small molecules that could copy
themselves…read more

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Charles Darwin
Charles Darwin was an English naturalist who studied variation in
plants and animals during a five-year voyage around the
world in the 19th century. He explained his ideas on evolution
in a book called, 'On the Origin of Species', published in 1859.…read more

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Summary of explanations for giraffes having long necks
Lamarck Vs Darwin
Lamarck Darwin
A giraffe stretches its neck to reach A giraffe with a longer neck can
food high up reach food high up
The giraffe is more likely to get
The giraffe's neck gets longer
enough food to survive and to
because it is used a lot
The giraffe's offspring inherit its The giraffe's offspring inherit its
long neck long neck…read more

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