1.1 Fossils Answers
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Why is still water an ideal environment for the formation of mold and cast fossils?
A
Sediment builds up over organisms.B
Sediment turns organisms into rock.C
Hard tissue decays under sediment.D
Soft tissue is preserved under sediment.2
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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.3
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.4
Which is a way that paleontologists have contributed to humans' understanding of the history of life?
A
They found evidence that climate has not changed significantly.B
They grouped organisms by the period in which they existed.C
They discovered that the first humans lived with dinosaurs.D
They learned that life has existed since Earth was created.5
What happens to soft parts of organisms when cast fossils form?
A
They decay.B
They petrify.C
They form carbon films.D
They become part of the fossil.6
Study the timeline.
A
Humans have only recently existed on Earth.B
Organisms originally lived only on land.C
Life on Earth started before water formed on Earth.D
Multicellular life evolved before complex single-celled life.7
Which part of an organism is preserved in cast and mold fossils?
A
skinB
boneC
muscleD
soft tissue8
Which correctly lists three materials that preserve soft tissues in fossils?
A
amber, minerals, and sedimentB
minerals, permafrost, and amberC
permafrost, amber, and tarD
sediment, minerals, and tar9
Which statement explains something that the fossil record indicates?
A
Earth is is still a very young planetB
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.10
The image shows a fossil that is hard like rock but that resembles a tree.
A
This fossil reveals the activities of an organism.B
This fossil was created in solidifying sediment.C
This fossil is an impression left by an organism.D
This fossil was an organism that has been turned into rock.Did you find these answers helpful?
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