Indiana Science Grade 7

Chapter 22: Clues to Earth’s Past

Clues to Earth’s Past

1.
The relative age of something is __________.
A)its age in relation to Earth
B)its age since it was discovered
C)its age since it died
D)its age in comparison to other things
2.
How is sediment transformed into rock?
A)Compaction and cementation occur.
B)Compaction and carbonization occurs.
C)Cementation occurs.
D)Compaction occurs.
3.
What do scientists use to determine the ages of rock within a rock layer?
A)trace fossils
B)index fossils
C)carbonaceous film
D)the type of rock it is
4.
What determines whether or not an organism will become a fossil?
A)how well it is protected from scavengers, decomposers, and physical agents that break things down
B)the weather conditions at the time of death
C)its chemical makeup
D)the type of soil it is buried in
5.
What geological theory has fossil evidence supported?
A)plate tectonics
B)The Big Bang
C)seafloor spreading
D)continental drift
6.
Why do many organisms leave carbonaceous films as evidence of their lives?
A)because the tissues of most organisms are made of compounds that contain nitrogen
B)because the bones of most organisms are made of compounds that contain carbon
C)because the bones of most organisms are made of compounds that contain nitrogen
D)because the tissues of most organisms are made of compounds that contain carbon
7.
What kind of information have fossils provided for scientists?
A)They have helped scientists determine when plants and animals first lived on land.
B)because the bones of most organisms are made of compounds that contain carbon
C)because the bones of most organisms are made of compounds that contain nitrogen
D)all of the above
8.
What is a carbonaceous film?
A)a mold of the original organism made of carbon residue
B)a silhouette of the original organism made of a thin film of carbon residue
C)a silhouette of the original organism made of a thin film of nitrogen residue
D)a cast of the original organism made of carbon residue
9.
What do scientists use to help them determine the absolute age of rocks and other objects?
A)the properties of the atoms they are made of
B)their weight
C)the number of atoms they are made of
D)the properties of the fossils they are made of
10.
When sedimentary rock is deposited on top of igneous or metamorphic rock, scientists call this __________.
A)normal unconformity
B)nonconformity
C)angular unconformity
D)disconformity
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