Geological Timeline

Flashcard
•
Science
•
6th - 8th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
How old is the Earth?
Back
Approximately 4.6 billion years old.
2.
FLASHCARD QUESTION
Front
What time period are dinosaurs, small mammals, and birds found in?
Back
Mesozoic Era.
3.
FLASHCARD QUESTION
Front
Why do scientists know more about the Cenozoic Era than any other era?
Back
It's the most recent and humans are around to study it.
4.
FLASHCARD QUESTION
Front
During which era did humans and mammals appear?
Back
Cenozoic Era.
5.
FLASHCARD QUESTION
Front
What determines when an era or period ends?
Back
Mass Extinction.
6.
FLASHCARD QUESTION
Front
What is the Precambrian Time?
Back
The earliest part of Earth's history, covering about 88% of Earth's timeline.
7.
FLASHCARD QUESTION
Front
What major event marks the end of the Paleozoic Era?
Back
The Permian-Triassic extinction event.
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