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Evolution - Coggle Diagram
Evolution
Geologic Time Scale
Divides Earth's 4.6 billion year history into manageable parts
The boundary between geologic time intervals matches up with climate changes, appeaser or extinction of many species
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Comparing Organisms
Scientists compare organisms anatomy and DNA to support the
Theory that
species share common ancestors
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Uniformitarianism
The same geologic processes that change the earth today have been at work in the past
Large cumulative changes usually take a very long time
EXAMPLE: Earthquakes
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Plate Tectonics
the theory that explains how tectonic plates move around earth's surface and changes shape
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Fossil Evidence Of Continental Drift
Mesoaurs fossils found in south America and Africa show that the continents were once joined
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An Effect Of Continental Drift
The Panama land bridge formed 3 million years ago joining North & South America
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Catastrophism
The principle that geologic change occurs suddenly
Catastrophism events are often unpredictable and changes thing quickly
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Index Fossil
Distinct,abundant, and widespread existed for a short span of geologic time used to date the rock layers they are found in
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Species
Organisms that share the same characteristics and adaptations can a male with another produce fertile offspring
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Evolution
The process by which populations slowly change over time
New species descend from older species
Descend: To come from
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Embryo Evidence
Most embryos look similar in their early stages
Embryos of organisms that have a closer genetic relationship to one another tend to look similar
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Fossil Record
Historical sequence of life
Shows the order of evolutionary changes
Shows how the environment conditions have changed on earth
Condition: A way of being
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Super Position
Principle that states that younger rocks lie above older rocks undisturbed rock layers
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