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Lesson 68 of 84 · Evolution
ExperimentDarwin and the Galapagos (Part 4)
What You'll Learn
Charles Darwin observed that finches on different Galapagos Islands had different beak shapes suited to their food sources. This helped him develop the theory of natural selection.
Key Words
- recessive
- mutation
Materials Needed
- iodine stain
- paper
- colored pencils
- coins (for Punnett squares)
- tape
Safety First
- Tie back long hair before starting the experiment.
- Protect your work surface with newspaper or plastic.
- Adult supervision recommended.
Steps
Step 1 — Read
Read and learn: Charles Darwin observed that finches on different Galapagos Islands had different beak shapes suited to their food sources. This helped him develop the theory of natural selection.
Step 2 — Do
Build your model using the materials provided.
Step 3 — Observe
Look for patterns in your observations.
Step 4 — Record
Make a graph or chart showing your results.
Check Your Understanding
Question 1
1 of 3Who is known for the theory of natural selection?