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WorksheetsUnit 5 Review
Total questions: 25
Worksheet time: 1hrs 13mins
Name
Class
Date
1.
Which type of rock are fossils typically found in?
a)
Igneousm
b)
Sedimentary
c)
Metamorphic
2.
These are dinosaur footprints. What is this a example of?
a)
All of the below!!!!!
b)
index fossil
c)
permineralized remains
d)
trace fossil
3.
What is hardened tree sap?
a)
coprolites
b)
index fossils
c)
gastroliths
d)
amber
4.
Fossils that are not the actual organism but evidence of that organism's existance.
a)
index fossils
b)
trace fossils
c)
altered hard parts
d)
original preservation
5.
On the geologic time scale, eras are subdivided into which of the following?
a)
indexes
b)
periods
c)
ages
d)
eons
6.
which of the following options describes the Cambrian Explosion?
a)
A great number of different organisms evolved
b)
a supercontinent broke apart
c)
a mass extinction event
d)
an asteroid collided into Earth
7.
A leaf falls into a shallow lake and is rapidly buried in the sediment that changes to rock over millions of years. Which type of fossil would be formed?
a)
mold and cast
b)
carbon film
c)
trace fossil
d)
amber
8.
A gap in the geologic record formed when sedimentary rocks cover an eroded surface is called a(n)____
a)
superpositioncast
b)
unconformity
c)
extrusion
9.
A hollow area in sediment in the shape of all or part of an organism is the description of which type of fossil?
a)
mold
b)
trace
c)
cast
d)
carbon film
10.
In which type of environment would a trilobite form?
a)
arid or desert
b)
tropical or humid
c)
oceanic or aquatic
d)
alpine or mountain
11.
this is a rocks age compared to the ages of other rocks.
a)
absolute age
b)
significant age
c)
partial age
d)
relative age
12.
what causes an unconformity?
a)
erosion
b)
superposition
c)
deposition
d)
faulting
13.
The precambrian era covers roughly what percent of Earth's history?
a)
20%
b)
5%
c)
50%
d)
88%
14.
what era are we currently living in?
a)
cenozoic
b)
quaternary
c)
mesozoic
d)
permian
15.
A type of fossil in which minerals replace all or part of an organism is the definition of which type of fossil?
a)
carbon film
b)
trace fossil
c)
petrified fossil
d)
cast
16.
According to the law of superposition, which layer is the youngest?
a)
A
b)
B
c)
C
17.
Which of the following correctly lists the layers in order from oldest to youngest?
a)
A, B, C, D, E
b)
E, B, C, D, A
c)
E, D, C, B, A
d)
C, B, A, D, E
18.
Letter "F" is a....
a)
inclusion
b)
intrusion
c)
fault
d)
unconformity
19.
What 2 things make a good index fossil?
a)
Good looks and a great smile
b)
widespread and on Earth of a short time
c)
widespread and on Earth for a long time
d)
only found in Clinton Twp and in every rock layer
20.
How many of the original atoms of a decaying isotope remain unchanged after three half-lives?
a)
three-halves
b)
three-quarters
c)
one-quarter
d)
one-eighth
21.
Why are isotopes with short half-lives not useful for dating very old rocks?
a)
because not enough of the parent isotope remains to measure accurately
b)
because not enough of the daughter product has formed to be detectable
c)
because neither the parent isotope nor the daughter product will be detectable
d)
because very old rocks would never have contained these isotopes
22.
What is the daughter element of carbon-14?
a)
nitrogen-14
b)
sodium-14
c)
lead-235
d)
carbon-16
23.
What does uranium decay into?
a)
Argon
b)
Potassium
c)
Lead
d)
Nitrogen
24.
The original element that undergoes radioactive decay is known as the...
a)
daughter element
b)
half-life
c)
parent element
d)
carbon-14
25.
What element is usually used to date fossils?
a)
uranium-235
b)
carbon-14
c)
mercury-203
d)
thorium-234
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