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damaskus [11]
3 years ago
12

What information did scientists use when developing the geologic timescale?

Biology
2 answers:
IgorC [24]3 years ago
8 0

Scientists studied the fossil record. They found four major changes in life forms. These four major changes were used to mark when one geologic era ended and the next began.

Keith_Richards [23]3 years ago
7 0
<span>Scientists first developed the geologic time scale by studying rock layers and index fossils through out the whole world. With this information, scientists placed Earth's rock layers in order by relative age. Later, radioactive dating helped determine the absolute age of the divisions in the geologic time scale.</span>
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What is the difference between the somatic and autonomic division of the nervous system?.
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Why do some codons code for the same
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djyliett [7]

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D) energy from the sun, air, and water

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2 years ago
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How do birds digest their food in the absence of teeth?
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They have a gizzard to grind the food.

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