Lesson 1 Fossil Evidence of Evolution
LA.6.2.2.3, MA.6.A.3.6, SC.7.L.15.1, SC.7.L.15.3, SC.7.N.1.1
Skim or scan the heading, boldfaced words, and pictures in the lesson. Identify or predict three facts
you will learn from the lesson. Discuss your thoughts with a classmate.
The Fossil Record
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Characterize the fossil record.
.
Millions of
Note-taking
Study Guide
Inquiry Lab
Examine how fossils form.
Formation
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.
Mineralization
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Carbonization
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Molds and casts
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Trace fossils
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.
Original material
192
The Environment and Change Over Time
Explanation of the Process
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Chapter Review
Evidence of
Thousands of species,
most of which are
Fossil Formation
Benchmark Practice
All the
Fossil Record
Lesson 1 | Fossil Evidence of Evolution (continued)
Determining a
Fossil’s Age
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Contrast relative-age dating with absolute-age dating.
• less precise
• more precise
• scientists compare
• scientists use
• shows relative order in which
• best measured in
Order the divisions of the geologic time scale.
.
Eon
Era
Period
MYA
Inquiry Lab
Study Guide
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Relate types of fossils found in different rock layers to the geologic
time scale.
Chapter Review
Benchmark Practice
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Dating
Note-taking
Fossils over Time
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Dating
.
The Environment and Change Over Time
193
Lesson 1 | Fossil Evidence of Evolution (continued)
Extinctions
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Relate changes in the fossil record to mass extinctions.
.
Fossil Record
Changes
Mass Extinctions
evidence
.
Note-taking
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Inquiry Lab
Organisms
depend on the
environment
for food and
shelter.
Quickly
Example:
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.
Animals can’t
find resources
they need to
survive.
Result:
Gradually
Example:
Evaluate how fossils provide scientists with evidence for
biological evolution.
Synthesize It
Benchmark Practice
Chapter Review
Summarize how the fossil record provides evidence of both extinctions
and biological evolution. Explain why it is important to look at fossils from multiple
rock layers at the same time to reach conclusions.
194
The Environment and Change Over Time
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Study Guide
Diagram causes and effects of environmental change.