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Geologic Time And Plate Tectonics
Test Description: Test over geologic time and plate tectonics (8th grade Missouri GLE's)
Instructions: Answer all questions to get your test result.
1) In an undisturbed geologic column, which layer contains the oldest fossils and how can you tell?
A
The one in the middle because of science.
B
The one at the top because the Law of Subduction.
C
How should I know? Hint: This is not the correct answer.
D
The one at the bottom because of the Law of Superposition.
2) What is the definition of an index fossil?
A
A fossil that is found in soft sediment.
B
A fossil that you can find in a museum.
C
A fossil used to determine the relative age of a rock layer. It is only found in 1 layer
D
A fossil that you can find in every layer of a geologic column.
3) The half-life of strontium-90 is 25 years. How old is a fossil when ¼ of its parent material remains?
A
50 years.
B
25 years.
C
75 years.
D
12.5 years.
4) In a rock column at the very bottom a seashell is found. What could you assume once was in the area?
A
Not enough information to tell.
B
It was were large land animals once lived.
C
A sea or ocean
D
A very tropical climate
5) Name 2 pieces of evidence that support the theory of continental drift.
A
Fossil evidence – fossils of same species found on different continents, Mountain ranges –mountains on different continents
B
Magnetic fields change in subduction zones and
C
Rocks –ages and kinds of rocks long the edge of one continent match those rocks along another continent and trees.
D
Continents seem to fit together and hot dogs.
6) Explain how convection currents move the tectonic plates like rafts.
A
The plates move because it's too hot to stay in one place.
B
Convection currents work by physically touching the hot mantle.
C
It's a scientific mystery.
D
The mantle rock heats up and rises. The mantle rock close to the surface cools and sinks. This is a convection cycle.
7) Which plate boundary produces mountain formation?
A
Convergent (continental vs. continental crust)
B
Divergent
C
Convergent with subduction (Continental vs. oceanic crust)
D
Transform
8) Explain how a boundary would form a mountain.
A
When two plates slide past one another.
B
When two plate move away from each other and magma leaks up and solidifies.
C
When two continental plates collide called convergent.
D
When one plate move underneath another.
9) Which plate boundary can result in a ridge formation?
A
Transform
B
Convergent
C
Divergent
D
Convergent with subduction
10) Explain how a ridge formation is formed.
A
The plates move apart and magma leaks up and hardens leaving behind a ridge valley.
B
When two plates slide past one another.
C
When two continental plates collide called convergent.
D
When one plate move underneath another.
11) Which plate boundary can result in volcanic activity?
A
Convergent with subduction
B
Convergent (continental vs. continental)
C
Transform
D
Convergent with sublimation
12) Explain how a plate boundary would cause volcanic activity.
A
The plates move apart and magma leaks up and hardens leaving behind a ridge valley.
B
When two continental plates collide and push rock upward.
C
Plates move together, the denser oceanic crust slides underneath the continental. The crust melts into magma and pushes up.
D
When two plates slide past one another.
13) Which plate boundary can cause earthquakes?
A
Divergent
B
Convergent with subduction
C
Transform
D
Convergent
14) Explain how a plate boundary can cause an earthquake?
A
By colliding into each other.
B
By moving apart from one another.
C
By sliding past one another.
D
By one going underneath the other.
15) You have a rock layer of A, B and C. A is on the top, B in the middle and C at the bottom. Describe the relative age of rock layer B.
A
Layer B is 160 year old.
B
There is no way to tell the age of rock layers.
C
Layer B is younger than A and older than C because of the Law of Superposition.
D
Layer B is older than A and younger than C because of the Law of Superposition.
*select an answer for all questions
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