Mass extinctions and Fossils

Flashcard
•
Science
•
6th - 8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a fossil?
Back
A fossil is a trace or remains of organisms that lived long ago.
2.
FLASHCARD QUESTION
Front
What is the principle of superposition?
Back
In undisturbed rock layers, the oldest layers are at the bottom and the youngest layers are at the top.
3.
FLASHCARD QUESTION
Front
What is an intrusion in geology?
Back
An intrusion is a body of igneous rock that has formed from magma that has cooled and solidified beneath the Earth's surface.
4.
FLASHCARD QUESTION
Front
What is a mass extinction?
Back
A mass extinction is a significant and rapid decrease in the biodiversity on Earth, where a large number of species become extinct in a relatively short period.
5.
FLASHCARD QUESTION
Front
What are some causes of mass extinctions?
Back
Major changes in environment or climate, asteroid impacts, volcanic eruptions, and overhunting.
6.
FLASHCARD QUESTION
Front
What does the term 'paleontology' refer to?
Back
Paleontology is the scientific study of the history of life on Earth through the examination of plant and animal fossils.
7.
FLASHCARD QUESTION
Front
What can fossils tell us about past environments?
Back
Fossils can provide information about the climate, geography, and ecosystems that existed in the past.
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