Question

A team of archaeologists excavating a sedimentary rock layer come across some primitive hunting tools used by early humans. As the dig progresses, they unearth the fossilized remains of a dinosaur from another layer of the sedimentary rock. Why do these discoveries indicate that the rocks were formed over millions of years?

Answer 1

Explanation:

The discoveries indicates that the rocks were formed over millions of years ago due to the age of fossils they contain.

Fossils are the preserved remains of life found in rocks. Most fossils are used in relative dating of rocks.

• Dinosaurs are extinct organisms that once lived in the Mesozoic. This was about 100 million years ago.
• Tool man also grazed the surface of the earth just a few thousands to a million years.
• We are able to find their fossils in rocks because they have lived in some certain geologic periods.
• Here we are using the fossils to date the rock and this is called relative dating

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Answer 2

Answer:

C) Dinosaurs became extinct millions of years before humans appeared.

Explanation:

Dinosaurs became extinct millions of years before humans evolved. So the sedimentary rock that contained the hunting tools and the dinosaur fossil would have formed over a period of millions of years.