Georgia Science Grade 6

Chapter 13: Clues to Earth's Past

CRCT Practice

1
Which principle states that the oldest rock layer is found at the bottom in an undisturbed stack of rock layers?
A)half-life
B)absolute dating
C)superposition
D)uniformitarianism
2
Which type of scientist studies fossils?
A)meteorologist
B)chemist
C)astronomer
D)paleontologist
3
Which type of fossil preservation is shown?
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078778441/516730/bk.jpg','popWin', 'width=340,height=208,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (21.0K)</a>
A)trace fossil
B)original remains
C)carbon film
D)permineralized remains
4
Which sequence of letters describes the rock layers in the diagram from oldest to youngest?
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078778441/516730/bl.jpg','popWin', 'width=345,height=284,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (41.0K)</a>
A)D, Q, A, Z, L
B)L, Z, A, Q, D
C)Z, L, A, D, Q
D)Q, D, L, Z, A
5
What does the wavy line between layers A and Q represent?
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078778441/516730/bl.jpg','popWin', 'width=345,height=284,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (41.0K)</a>
A)a disconformity
B)a fault
C)a nonconformity
D)an angular unconformity
6
Which of the following correctly describes the relative age of the fault?
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078778441/516730/bl.jpg','popWin', 'width=345,height=284,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (41.0K)</a>
A)younger than A, but older than Q
B)younger than Z, but older than L
C)younger than Q, but older than A
D)younger than D, but older than Q
7
Which are the remains of species that existed on Earth for relatively short periods of time, were abundant, and were widespread geographically?
A)trace fossils
B)index fossils
C)carbon films
D)body fossils
8
Which term means matching up rock layers in different places?
A)superposition
B)correlation
C)uniformitarianism
D)absolute dating
9
Which type of fossil preservation is a thin carbon silhouette of the original organism?
A)cast
B)carbon film
C)mold
D)permineralized remains
10
What value should replace the letter X?
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078778441/516730/bm.jpg','popWin', 'width=350,height=208,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (19.0K)</a>
A)50
B)125
C)25
D)75
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