AnswersEAP - VA - Earth Science B CRUnit Test

Fossils Answers

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Which statement explains something that the fossil record indicates?

A
Earth is is still a very young planet
B
Mammals have always existed on Earth.
C
Mass extinctions have occurred several times on Earth.
D
The amount of water on Earth has decreased over time.
2
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Which feature do amber fossils have that mold fossils do not?

A
preserved soft tissue
B
organisms turned into rock
C
solid copies of the original organism
D
impressions of hard tissue left by organisms
3

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

A
skin
B
bone
C
muscle
D
soft tissue
4

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

A
amber, minerals, and sediment
B
minerals, permafrost, and amber
C
permafrost, amber, and tar
D
sediment, minerals, and tar
5

An animal dies in mud, decomposes, and leaves an imprint, which is later filled by sediment to form a solid copy of the original organism.How is this fossil different from fossils of preserved remains?

A
Only hard tissue is preserved.
B
Hard and soft tissues are preserved.
C
Only soft tissue is preserved.
D
There is little change to the preserved organism.
6

How are casts formed by decaying organisms?

A
Organisms turn into rock over time.
B
Organisms leave carbon residue on a rock.
C
Organisms leave impressions in sediment that hardens into rock.
D
Impressions left by organisms are filled in with sediment that hardens into rock.
7

Study the image.

Question illustration
A
It has carbon residue left by a decaying organism.
B
It was formed by tree sap that turned into amber.
C
It was preserved in frozen soil called permafrost.
D
It includes the preserved soft tissue of an organism.
8

Some fossils provide evidence to suggest that Earth's climate has changed over time.What information can scientists obtain from these fossils?

A
temperatures
B
number of species that existed
C
movement of continents
D
cause of mass extinctions
9

Which type of fossils form from hardening sediment?

A
casts
B
tar pit fossils
C
carbon films
D
amber fossils
10

How do organisms form carbon films?

A
Organisms turn into rock.
B
Residue is left on rocks when organisms decay.
C
Hollow forms are left in sediment by decaying organisms.
D
Organisms leave evidence of their activities, such as footprints.

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