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Earth History
Test Description: Earth History and Fossils
Instructions: Answer all questions to get your test result.
1) Why do scientists study rocks and fossils?
A
Scientists study fossils as a way of learning about the ancient past.
B
The studying of fossils can also help learn how the Earth evolved over time as well as how things developed over time.
C
All of the above
D
To learn about the age of the earth.
2) Based on fossil records, how old is the Earth?
A
3 billion years old
B
5.7 billion years old
C
20 years old
D
4.6 billion years old
3) What happened during the Precambrian time?
A
All of the above.
B
The creation of the Earth.
C
The formation of the Sun and light.
D
The creation of the atmosphere through volcanic out-gassing.
4) Which era is the oldest?
A
Paleozoic
B
Cenozoic
C
Precambrian
D
Mesozoic
5) What is the difference between a strike slip fault and a dip fault?
A
none of the above
B
Strike Slip moves vertically. Dip Slip moves horizontally.
C
Strike Slip moves horizontally. Dip Slip moves vertically.
D
Strike slip is composed of normal and reverse faults.
6) What is unique about animals that are preserved in ice?
A
They are trace fossilized
B
None of the above
C
They are completely intact with organs, muscles, and even skin.
D
They are still alive
7) Why is the Cenozoic era important?
A
It was the Age of the Trilobites
B
It was the Age of the Dinosaurs
C
It had a mass extinction
D
It was the Age of Mammals
8) How do scientists use radioactive dating?
A
To age ice and check the atmosphere.
B
none of the above
C
To date rocks based on a comparison between the observed abundance of a naturally occurring radioactive isotopes.
D
To discover new species
9) What is Pangaea?
A
A new species of mammals that evolved from the mesozoic era.
B
Earth's crust spread apart creating new climates and mass extinctions.
C
Earth’s continents moved together to form a great landmass, or supercontinent at the end of the Paleozoic Era.
D
A new species of dinosaurs.
10) What is a trace fossil?
A
forms when the mud or sand hardens to stone where a footprint, trail, or burrow of an organism was left behind.
B
forms when a mold is filled with sand or mud that hardens into the shape of the organism
C
forms when entire organisms or parts of organisms are prevented from decaying by being trapped in rock, ice, tar, or amber.
D
All of the above
11) What is a mold fossil?
A
forms when sediments bury an organism and the sediments change into rock; the organism decays leaving a cavity in the shape o
B
none of the above
C
forms when minerals soak into the buried remains, replacing the remains, and changing them into rock.
D
forms when a mold is filled with sand or mud that hardens into the shape of the organism
12) What is weathering ?
A
All of the above
B
Forms when the weather forms fossils in the sedimentary rock layers.
C
Is the same as erosion
D
the breaking down of rocks, soil and minerals as well as artificial materials through contact with the Earth's atmosphere, bi
13) How does carbon film form?
A
When minerals replace all or part of an organism.
B
When a plant or animal gets preserved in ice, tar, or amber.
C
All of the above
D
Gases escape from sediment, leaving carbon behind. Eventually only a thin film of carbon remains.
14) What is a half-life?
A
None of the above
B
Half of the number or periods that are in an era
C
Half the number of atoms a fossil has.
D
The length of time needed for half of the atoms of a sample of a radioactive isotope to decay.
15) The bottom layer in an undisturbed sedimentary bed is usually
A
The largest
B
The oldest
C
On top
D
The smallest
16) Geologists use radioactive dating to find the
A
absolute age of rocks
B
none of the above
C
relative age of rocks
D
half life of the rocks
17) At this time, all life lived in the oceans.
A
Paleozoic
B
Precambrian
C
Mesozoic
D
Cenozoic
18) What is Law of Superposition?
A
That each layer of rock is older than the layer below it.
B
The geologic principle that states that in horizontal layers of sedimentary rock,each layer is older than the layer above it
C
Is the Law of the land
D
Has nothing to do with Earth History
19) A type of rock formed by cooled magma is
A
metamorphic
B
igneous
C
bedrock
D
sedimentary
20) A type of rock formed by heat and pressure is
A
none of the above
B
sedimentary
C
igneous
D
metamorphic
*select an answer for all questions
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