Earth was formed roughly ____________ years ago.
212 Module 12 Mid Grade

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Science
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8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
4.5 billion
2.
FLASHCARD QUESTION
Front
If a life-form cannot adapt to a climate change, what would be the end result?
Back
Extinction
3.
FLASHCARD QUESTION
Front
A species is __________ if no members of that species are living.
Back
extinct
4.
FLASHCARD QUESTION
Front
Volcanic activity can affect the climate on Earth by __________ the amount of sunlight that reaches the surface for long periods of time.
Back
decreasing
5.
FLASHCARD QUESTION
Front
Of all species that have existed on Earth, __________ are now extinct.
Back
99.9%.
6.
FLASHCARD QUESTION
Front
What is the term for the process by which species evolve to adapt to their environment?
Back
Natural Selection
7.
FLASHCARD QUESTION
Front
What is the significance of the fossil record in understanding extinction?
Back
It provides evidence of past life forms and their extinction events.
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