
Unit 3 Earths History
Flashcard
•
Science, Geography, History
•
8th - 9th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a fossil?
Back
The remains of a prehistoric organism.
2.
FLASHCARD QUESTION
Front
What does the law of uniformitarianism state?
Back
The idea that the earth has always changed in uniform ways.
3.
FLASHCARD QUESTION
Front
What is extrusive igneous rock?
Back
Rock produced when magma exits and cools as lava at or near the earth's surface.
4.
FLASHCARD QUESTION
Front
What is an unconformity?
Back
A break in time otherwise continuous rock record.
5.
FLASHCARD QUESTION
Front
What is a mold fossil?
Back
A fossilized imprint made in the substrate.
6.
FLASHCARD QUESTION
Front
What is a trace fossil?
Back
A fossil that provides evidence of the activity of ancient organisms.
7.
FLASHCARD QUESTION
Front
What is an index fossil?
Back
A fossil that is used to define and identify a particular time period.
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