Fossils

Question 1

Why is still water an ideal environment for the formation of mold and cast fossils?

Revolt · Accepted Answer

Sediment builds up over organisms.

Question 2

Which statement explains something that the fossil record indicates?

Revolt · Accepted Answer

Mass extinctions have occurred several times on Earth.

Question 3

Which feature do amber fossils have that mold fossils do not?

Revolt · Accepted Answer

preserved soft tissue

Question 4

Which correctly lists three materials that preserve soft tissues in fossils?

Revolt · Accepted Answer

permafrost, amber, and tar

Question 5

What happens to soft parts of organisms when cast fossils form?

Revolt · Accepted Answer

They decay.

Question 6

Study the image.

Revolt · Accepted Answer

It has carbon residue left by a decaying organism.

Question 7

Which is a way that paleontologists have contributed to humans' understanding of the history of life?

Revolt · Accepted Answer

They grouped organisms by the period in which they existed.

Question 8

How are casts formed by decaying organisms?

Revolt · Accepted Answer

Impressions left by organisms are filled in with sediment that hardens into rock.

Question 9

Which part of an organism is preserved in cast and mold fossils?

Revolt · Accepted Answer

bone

Question 10

Study the timeline.

Revolt · Accepted Answer

4.1 billion years ago

Fossils Answers