Geologic Time
Flashcard
•
Science
•
7th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
Fossils provide evidence of __________.
Back
how life and the environmental conditions have changed over time
2.
FLASHCARD QUESTION
Front
What does the presence of limestone at the top of the Himalayas indicate about Earth's history?
Back
It shows that Earth has evolved over time as areas of land that have once been covered in water, but no longer are.
3.
FLASHCARD QUESTION
Front
Traces or remains of organisms that lived long ago are called __________.
Back
Fossil
4.
FLASHCARD QUESTION
Front
Why would a cave explorer find Megalodon shark teeth in the Arizona Desert?
Back
Millions of years ago, parts of Arizona were under water. Over time the Earth changed, the ocean became a desert, and the shark's teeth were fossilized.
5.
FLASHCARD QUESTION
Front
According to the Law of Superposition, which layer is older: Layer 7 or Layer 5?
Back
Layer 7 is older than layer 5.
6.
FLASHCARD QUESTION
Front
What is the Law of Superposition?
Back
In a sequence of undisturbed sedimentary rocks, the oldest layers are at the bottom and the youngest layers are at the top.
7.
FLASHCARD QUESTION
Front
What is a sedimentary rock?
Back
A type of rock that is formed by the accumulation and compaction of mineral and organic particles.
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