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Charles Darwin (1809-1882) and The Galapagos Islands. Darwin’s Ideas. The diversity of living species was far greater than anyone had previously known These observations led him to develop the theory of evolution. Darwin’s Finches. Environmental adaptation. Each island

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Presentation Transcript
darwin s ideas
Darwin’s Ideas

The diversity of living

species was far greater

than anyone had

previously known

These observations led

him to develop the

theory of evolution

Darwin’s Finches

environmental adaptation
Environmental adaptation

Each island

had its own

type of

tortoises and

finches that

were clearly

different

from other

islands

List reasons why the tortes and finches would be different?

evolution
Evolution

Evolution is a well supported explanation of

phenomena that have occurred in the natural world

A theory in science is a well tested hypothesis, not

just a guess

What is the evidence that supports evolution?

the grand canyon
The Grand Canyon

Rock layers take time to form. Processes can be

seen in action today.

How can fossils (remains of organisms) in these rocks

be evidence of evolution?

270 – 280 million years

280 – 300 million years

300 – 500 million years

700 – 1,100 million years

relative dating
Relative dating

How can rock formations/layers containing

fossils (remains of organisms) be evidence of

evolution?

carbon 14 carbon 12
Carbon 14/Carbon 12

Carbon 14/Carbon 12

ratio changes after death

of an organism giving

age estimate.

evolution of whales
Evolution of Whales

Look at the

diagrams

comment

them

lamark 1801 1809 theory of acquired characteristics
Lamark (1801-1809)Theory of acquired characteristics
  • The effect of environment on the species.
  • The effect of use and disuse of organs and
  • The inheritance of acquired characters.

Give a reason why a giraffe may have acquired a longer neck?