The Age of Mammals refers to the ___
The History of Life on Earth

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Science
•
7th - 8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Cenozoic Era
2.
FLASHCARD QUESTION
Front
During ___, life is thought to have originated from nonliving matter.
Back
Precambrian Time
3.
FLASHCARD QUESTION
Front
If the half-life of an unstable element is 5,000 years, what percentage of the parent material will be left after 10,000 years?
Back
25%
4.
FLASHCARD QUESTION
Front
Explain how primates and hominids differ.
Back
Hominids are a type of primate, but not all primates are hominids.
5.
FLASHCARD QUESTION
Front
In which era are we currently living?
Back
Cenozoic era
6.
FLASHCARD QUESTION
Front
What is the geological time scale?
Back
A system of chronological dating that relates geological strata to time.
7.
FLASHCARD QUESTION
Front
Define Precambrian Time.
Back
The earliest part of Earth's history, covering about 88% of its geological time.
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