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Title:

Geologic History

Url:

http://www.mrsciguy.com/EarthScience/history.html

Creator:

Medina, Philip

Publisher:

Medina, Philip

Description: This unit introduces younger students to the concept of relative versus absolute time and how geologists determine the age of geologic events and features. Topics include the laws that determine relative age (superposition, cross-cutting relationships, included fragments, and others), and how to re-construct the geologic history of an area using these relationships. There is also information on geologic correlation and the use of index fossils to determine relative age. The section on absolute time discusses some ways of measurement (tree rings, radioactive dating) and introduces the concepts of natural selection and mass extinctions. A vocabulary and downloadable, printable student worksheets are provided.

LC Classification:

Science -- Geology -- Dynamic and structural geology -- Geological time. Age of the earth
Science -- Geology -- Study and teaching. Research

GEM Subject:

Science -- Earth science
Science -- Instructional issues
Science -- Geology

Key Concept:

Geology -- Geologic time

Resource Type:

Reference Material
Instructional Material
Instructional Material -- Lesson/Lesson Plan
Instructional Material -- Instructor Guide/Manual

Format:

Document -- DOC
Document -- HTML

Audience:

Educator
Learner

Education Level:

High School
Middle School
Elementary School

Language:

English

Access Rights:

Free access

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Source:

DLESE

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