1. 16.1 Darwin’s Theory of Evolution
Learning Targets:
Describe the pattern Darwin observed among organisms of the Galapagos Islands
Entry Task:
Make each heading a question Ex. What is the voyage of the beagle? Then read the section and answer your questions

2. The Puzzle of Life’s Diversity
Evolution: A theory based on scientific facts, observations, and hypotheses that solves this puzzle of diversity Theory: A well supported, testable explanation of phenomena that have occurred in the natural world
Q: What is the puzzle scientist are trying to solve about all the living things on earth?
How did all these different organisms arise?
How are they related?

3. Voyage of the Beagle
1831 H.M.S Beagle set sail for a trip around the world
On this trip Charles Darwin made observations which led to his evolutionary hypothesis about the way life changes over time

4. Darwin’s Observations
Living Organisms and Fossils
Living things were only part of the puzzle
Many living organisms looked like the fossils Darwin found.
Many fossils didn’t look like anything he had ever seen before.
Patterns of Diversity
Organisms are well suited for their environment
Why do grassland animals in England not live in the grasslands of Australia?
The Galapagos Islands
Close together but very different climates
The giant tortoises varied in predictable ways
Lets look at the neck length and shell shape pg. 371

5. The Journey Home
Q: Did animals on different islands once belong to the same species?

6. Ideas that shaped Darwin’s Thinking
Learning Targets:
State how Hutton and Lyell described geological Change
Identify how Lamarck thought species evolved
Describe Malthus’s theory of population growth

7. Biology and History 1785 James Hutton 1798 Thomas Malthus
1809 Jean-Baptiste Lamarck
1831 Charles Darwin
1833 Charles Lyell
1858 Alfred Wallace

8. ET: Create this chart in your notebook
Name
Date
Information
Hutton
1795
Very slow processes formed the Earth’s surface over millions of years
Lyell
1820’s – 1830’s
Principles of Geology – caused Darwin to understand how process we observe now also existed in the past and must be used to explain what happened in the past
Lamarck
1809
Selective use or disuse caused change in species
Malthus
1798
War, famine, and disease control populations

9. Darwin’s Dangerous Idea
LT: Todays film will address the following Power Standards:
Who is Charles Darwin and what were his contributions to the theory of evolution
What ideas/other peoples research influenced Darwin in his development of his theory on evolution
Todays Habits of Mind
Asking genuine questions
Explain your reasoning
Listen to understand