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WorksheetsES08-2 DETERMINING THE AGE OF ROCK
Total questions: 24
Worksheet time: 22mins
Name
Class
Date
1.
Lava that hardens on the surface only
a)
intrusion
b)
extrusion
c)
unconformity
d)
absolute age
2.
Magma that cools and pushes into the rock inside the Earth
a)
intrusion
b)
extrusion
c)
absolute age
d)
relative age
3.
The age of rock given a a number of years
a)
intrusion
b)
extrusion
c)
relative age
d)
absolute age
4.
What is the oldest layer?
a)
a
b)
b
c)
c
d)
d
5.
Which is older, A or D?
a)
A
b)
D
6.
States that rock layers on bottom are the oldest
a)
horizontality
b)
uniformitarianism
c)
superposition
d)
cross cutting
7.
The age of rock compared to the ages of rock layers
a)
unconformity
b)
relative age
c)
absolute age
d)
extrusion
8.
Which statement best describes the Law of Superposition?
a)
Each sedimentary layer of rock represents 1000 years of Earth's age, much like the rings of a tree.
b)
In undisturbed layers of sedimentary rock, the upper rock layers are older than the lower rock layers
c)
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks
d)
Rocks that form near volcanoes are older than surrounding rock.
9.
Based on the Law of Superposition, what can be concluded about fossils?
a)
fossils give clues about past climate patterns
b)
Fossils form from the hard parts of organisms
c)
The oldest fossils are found in the lowest rock layers
d)
The most recent fossils were advanced organisms
10.
Which can most likely be concluded about the top layer of rock seen in an undisturbed cliff wall?
a)
The top layer is older than layers located farther down the cliff.
b)
The top layer is younger than layers located farther down the cliff.
c)
The top layer contains more fossils than layers located farther down the cliff.
d)
The top layer contains fewer fossils than layers located farther down the cliff.
11.
The picture shows a close-up view of fossils found with the cliff wall.
This cliff is most likely composed of?
This cliff is most likely composed of?
a)
igneous rock
b)
molten rock
c)
metamorphic rock
d)
sedimentary rock
12.
The diagram shows some of the layers of rocks found in the Grand Canyon. Scientists find these layers of rock useful for studying fossils
What type of rock is shown labeled in these layers?
What type of rock is shown labeled in these layers?
a)
extrusive
b)
igneous
c)
metamorphic
d)
sedimentary
13.
Which conclusion correctly describes the youngest rock layer in the diagram?
a)
Layer W is the youngest because it is the top layer of sedimentary rock and the only layer that contains fossils.
b)
Layer X is the youngest because it is the middle layer of sedimentary rock.
c)
Layer Y is the youngest because it is the bottom layer of sedimentary rock.
d)
Layer Z is the youngest because it was once molten rock that moved through all three layers of sedimentary rock.
14.
The picture shows four different rock layers in a hillside.
What is the best evidence that one of these layers of rock was formed under an ocean?
What is the best evidence that one of these layers of rock was formed under an ocean?
a)
the thickness of the layer
b)
the type of fossils in the layer
c)
the number of caves in the layer
d)
the height above sea level of the layer
15.
A girl collects rocks while at the beach. She notices tht the rocks are milky white and contain fossils. What type of rock has she found?
a)
sedimentary, because it contain fossils
b)
sedimentary, because it is milky white
c)
metamorphic, because it contains fossils
d)
metamorphic, because it is milky white
16.
Dating rocks by comparing rock layers is
a)
absolute age
b)
relative age
c)
radioactive dating
d)
layer cake
17.
According to the law of superposition the youngest rocks are found
a)
on top of rock layers
b)
on bottom of rock layers
c)
in the middle of rock layers
18.
A meteorite hit Earth and caused a mass extinction of dinosaurs. Where can dinosaur fossils be found?
a)
under the meteorite impact rock layer
b)
above the meteorite impact rock layer
19.
What evidence is not used to date the age of the Earth?
a)
rock layers
b)
fossils
c)
books
d)
radioactive decay
20.
4.6 Billion years is the
a)
age of Trailridge.
b)
age of Mars.
c)
age of Mr. Sigg.
d)
age of the Earth.
21.
Which of the following would not be preserved to form a fossil?
a)
shell
b)
tooth
c)
stomach
d)
bone
22.
An original sample of Carbon is 60 grams. How much would be left after 3 half-lives?
a)
30 grams
b)
7.5 grams
c)
15 grams
d)
0 grams
23.
Radioactive dating uses what to determine the age of rock?
a)
radios
b)
calendars
c)
isotopes (unstable atoms)
d)
rock layers
24.
Organisms that lived for a short period of time and where found everywhere are
a)
cast fossils
b)
mold fossils
c)
index fossils
d)
old
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