2. OBSERVATIONS All creatures have common characteristics Evidence: DNA
comparing anatomy
study the embryos

4. OBSERVATIONS The Earth is very old Evidence:
radioactive dating of rocks

5. OBSERVATIONS Creatures have changed over time Evidence:
the fossil record

7. The Fossil Record direwolf
Many creatures that lived in the past don’t exist today
The creatures alive today haven’t always been around
Many creatures in the past looked like living ones we see today
direwolf

10. Putting It Together Many different species alive today
All life shares common characteristics
The Earth is very old
Life is very old
Life has changed over time
The changes have been little changes over long periods of time

11. We Can See Evolution Happen!
Bacteria Strains
Artificial Selection