Transcript 15.1 Darwin*s Theory of Evolution Wed. 2/2

16.1 Darwin’s Theory of Evolution
The Puzzle of Life’s Diversity
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?
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
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
Darwin’s Observations
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
The Journey Home
Q: Did animals on
different islands
once belong to the
same species?
Ideas that shaped Darwin’s Thinking
• State how Hutton and
Lyell described
geological Change
• Identify how Lamarck
thought species evolved
• Describe Malthus’s
theory of population
growth
Biology and History
• 1785 James Hutton
• 1798 Thomas Malthus
• 1809 Jean-Baptiste
Lamarck
• 1831 Charles Darwin
• 1833 Charles Lyell
• 1858 Alfred Wallace
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
Malthus
1798
Selective use or disuse caused
change in species
War, famine, and disease control
populations
Darwin’s Dangerous Idea
Todays Habits of Mind
• Asking genuine questions
• Explain your reasoning
• Listen to understand
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