Glencoe Science Level Blue

Chapter 9: Clues to Earth's Past

Clues to Earth’s Past

1
What kind of information have fossils provided for scientists?
A)They have helped scientists determine when life first appeared on Earth.
B)They have helped scientists determine when plants and animals first lived on land.
C)
D)all of the above
2
What does a paleontologist study?
A)plants
B)life
C)dinosaurs
D)fossils
3
Rocks that can be dated radiometrically are mostly __________.
A)igneous and sedimentary rocks
B)igneous and metamorphic rocks
C)sedimentary and metamorphic rocks
D)metamorphic rocks
4
Trace fossils are__________.
A)fossilized tracks or other evidence of an organism
B)silhouettes of the original organism made of thin films of carbon residue
C)fossils that are traced in rock
D)fossils scientists use to determine the age of rock around it
5
How is sediment transformed into rock?
A)Compaction and cementation occur.
B)Compaction and carbonization occurs.
C)Compaction occurs.
D)Cementation occurs.
6
When sedimentary rock is deposited on top of igneous or metamorphic rock, scientists call this __________.
A)normal unconformity
B)angular unconformity
C)nonconformity
D)disconformity
7
When younger sediments are deposited on top of an older area of erosion, scientists call this __________.
A)nonconformity
B)angular unconformity
C)disconformity
D)normal unconformity
8
What do large volumes of plant matter that have become carbonized form?
A)mountains
B)coal
C)tar
D)dirt
9
What do scientists use to determine the ages of rock within a rock layer?
A)the type of rock it is
B)index fossils
C)trace fossils
D)carbonaceous film
10
What type of method do scientists use to determine correlation of rock layers?
A)fossil evidence
B)radioactive decay
C)half-life
D)all of the above
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