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Topic 6 Lesson 1 Review

Total questions: 20

Worksheet time: 19mins

Name
Class
Date
1.
The length of time required for half of the radioactive atoms in a sample to decay is its...
a)
era
b)
age
c)
half-life
d)
eon
2.
How does absolute age differ from relative age?
a)
only absolute dating indicates which rock is older than another
b)
only absolute dating finds the age in years
c)
only relative dating finds the age in years
3.
Radiometric dating is possible because the rates of decay of radioactive isotopes _____.
a)
change over time
b)
change from place to place
c)
are constant
d)
vary widely
4.
According to the law of superposition, the oldest fossils are found 
a)
At the top of the rock layers
b)
Near the bottom of the rock layers
c)
In the middle of the rock layers
d)
Somewhat near the surface
5.
According to the law of superposition, which layer is the youngest?
a)
A
b)
B
c)
C
6.
states that the geologic feature which cuts another is the younger of the two features
a)
law of horizontality
b)
cross cutting relationships
c)
law of superposition
d)
uniformitarianism
7.
Letter "F" is a....
a)
inclusion
b)
intrusion
c)
fault
d)
unconformity 
8.
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
9.
How old is the Earth?
a)
4.6 billion years
b)
1.4 billion years
c)
4.6 million years
d)
6000 years
10.
The ________ states that layers of sediment were originally deposited horizontally under the action of gravity.
a)
law of superposition
b)
law of horizontality 
c)
uniformitarianism 
d)
unconformities
11.
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
12.

A break in the geologic record that is made when rock layers are ERODED over a long period of time

a)

superposition

b)

relative dating

c)

unconformity

d)

cross-cutting

13.

Is intrusion V older or younger than layer W?

a)

younger

b)

older

14.
Which fossil makes the best index fossil?
a)
Fossil 1
b)
Fossil 2
c)
Fossil 3
d)
None follow all of the rules
15.

What is the best reason that fossil #4 is NOT a good index fossil?

a)

It is not widespread

b)

it is not short-lived (in numerous layers)

c)

It is in half of the outcrops

16.

Which of the follow is INCORRECT about an index fossil?

a)

The fossil must have lived only during a short part of the Earth's history.

b)

Many fossils of the organism must be found in the rock layers.

c)

The fossil must be found over a wide area of the Earth and be unique.

d)

The fossil must only be found in one area.

17.
What do paleontologists study?
a)
space
b)
fossils
c)
atmosphere
d)
weather
18.
In what type of rock do we typically find fossils?
a)
Metamorphic
b)
Igneous
c)
Sedimentary
d)
Minerals
19.
What does absolute dating tell us about rocks and fossils?
a)
Relative dating
b)
Superposition
c)
Paleontology
d)
Exact age
20.

The state fossil of Pennsylvania is the

a)

brachiopod

b)

trilobite

c)

ammonite

d)

crinoid

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