Animals change over time through the process of evolution. Some scientists believe that birds evolved from dinosaurs like Archaeopteryx due to similarities in their skeletons. There are two theories for how giraffes evolved their long necks - Lamarck's theory that giraffes stretched their necks over generations to reach higher leaves, and Darwin's theory that giraffes with longer necks were more likely to survive due to having greater access to food. Animals change through evolution in order to better adapt to their environments over many generations.

1. EvolutionEvolution

2. Animals change in time = EVOLUTION.
Time……
Archaeopteryx (Dinosaur) Birds
Are birds descendants of dinosaurs?
Some scientists say YES

3. What do you think?
Could it be possible?

4. What do you think?
Megalosaurus Ostrich
Are their skeletons similar?

5. Evolution of giraffes
Two possible theories:
• Lamark
• Darwin
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students!!

6. Giraffe evolution (Lamark)
VIDEO
Long time ago, giraffes had short neck...
They couldn’t reach the highest
leaves…
Little by little their neck became longer

7. Giraffe evolution (Darwing)
1. Long time ago, there were giraffes with
short and long neck. The ones with short
neck couldn’t eat, they were really hungry.
2. Only long-necked giraffes survived.

8. Why do animals change as time goes by?
Animals change to adapt to the environment