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Journal #1:
Do the inquiry activity pg. 368
*procedure 1 & 2
*make a data table and graph

Vocabulary:
 Evolution
 Theory
 Fossil

Objective #1:
Describe the
pattern Darwin
observed among
the organisms of
the Galapagos
Islands.
Chapter 15
Darwin’s Theory of
Evolution
15-1 The Puzzle of Life’s Diversity
*Interactive pgs. 367-372
Why are living things so
different?

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The answer is a collection of facts,
observations, and hypothesis known as
evolutionary theory.
Evolution



Change over time
Modern organisms descended from ancient
organisms
Evolution is a Theory

A well supported explanation
Charles Darwin &
the Voyage of the Beagle

Charles Darwin

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
English Naturalist
Observations and publications led to the
development of Evolutionary theory
H.M.S. Beagle


A ship that sailed around the world
Darwin was on board and collected plant and
animal specimens at every stop.
Darwin’s Observations

Patterns of Diversity
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Plants and animals well suited to environments
Very different looking and behaving animals
Living organisms and Fossils

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Preserved remains of ancient organisms
Resembled some living and some nonliving
animals
The Galapagos Islands

Group of Islands
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1000km west of South America
Islands close together but with different climates
Animals
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Tortoises had different shells and neck lengths
depending on the island they lived on
Birds with different beak shapes
Pinta
Pinta Island
Tower
Marchena
Intermediate shell
Fernandina
James
Santa Cruz
Isabela
Santa Fe
Hood Island
Floreana
Isabela Island
Dome-shaped shell
Hood
Saddle-backed shell
The Journey Home

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Had time to study his notes and specimens
Noticed many plants and animals have very
different characteristics depending on which
island they were found
Hypothesis Developed: Did these separate
species evolve from a common ancestor?