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- 1. Multiple Choice
Which part of an organism is preserved in cast and mold fossils?
skin
bone
muscle
soft tissue
- 2. Multiple Choice
Which correctly lists three materials that preserve soft tissues in fossils?
amber, minerals, and sediment
minerals, permafrost, and amber
permafrost, amber, and tar
sediment, minerals, and amber
- 3. Multiple Choice
Why is still water an ideal environment for the formation of mold and cast fossils?
sediment builds up over organisms
sediment turns organisms into rock
hard tissue decays under sediment
soft tissue is preserved under sediment
- 4. Multiple Choice
How do organisms form carbon films?
organisms turn into rock
residue is left on rocks when organisms decay
hollow forms are left in sediment by decaying organisms
organisms leave evidence of their activities such as footprints
- 5. Multiple Choice
What happens to soft parts of organisms when cast fossils form?
they decay
they petrify
they form carbon films
they become part of the fossil
- 6. Multiple Choice
How are casts formed by decaying organisms?
organisms turn into rock over time
organisms leave carbon residue on a rock
organisms leave impressions in sediment that hardens into rock
impressions left by organisms are filled in with sediment that hardens into rock
- 7. Multiple Choice
Which type of fossils form from hardening sediment?
casts
tar pit fossils
carbon films
amber fossils
- 8. Multiple Choice
Which feature do amber fossils have that mold fossils do not?
preserved soft tissue
organisms turned into rock
solid copies of the original organism
impressions of hard tissues left by organisms
- 9. Multiple Choice
Study the image. How does this fossil differ from fossils that have preserved remains? Which feature does this fossil have that preserved remains do not have?
it has carbon residue left by a decaying organism
it was formed from tree sap that turned into amber
it was preserved in frozen soil called permafrost
it includes the preserved soft tissue of an organism
- 10. Multiple Choice
The image shows a fossil that is hard like rock but that resembles a tree. Which statement explains how this type of fossil differs from a trace fossil?
this fossil reveals the activities of an organism
this fossil was created in solidifying sediment
this fossil is an impression left by an organism
this fossil was an organism that has been turned into rock
- 11. Multiple Choice
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?
only hard tissue is preserved
hard and soft tissue is preserved
only soft tissue is preserved
there is little change to the preserved organism
- 12. Multiple Choice
Which is a way that paleontologists have contributed to humans' understanding of the history of life?
They found evidence that climate has not changed significantly.
They grouped organisms by the period in which they existed.
They discovered that the first humans lived with dinosaurs.
They learned that life has existed since Earth was created.
- 13. Multiple Choice
Which statement explains something that the fossil record indicates?
Earth is 4.5 billion years old.
Mammals have always existed on Earth.
Mass extinctions have occurred several times on Earth.
The amount of water on Earth has decreased over time.
- 14. Multiple Choice
Some fossils provide evidence to suggest that Earth's climate has changed over time. What information can scientists obtain from these fossils?
temperatures
number of species that existed
movement of continents
cause of mass extinctions
- 15. Multiple Choice
Study the timeline. Based on fossil evidence, about how long ago did the first single-celled life form appear on Earth?
130 million years ago
1.5 billion years ago
2.5 billion years ago
4.1 billion years ago
- 16. Multiple Choice
Study the timeline. Which statement indicated what the fossil record suggests about evolution on Earth?
Humans have only recently existed on Earth.
Organisms originally lived on land.
Life on Earth started when water formed on Earth.
Multicellular life evolved before complex single-celled life?
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