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Earth Science
Test Description: Mid year review
Instructions: Answer all questions to get your test result.
1) Magma is:
A
the source of all igneous rocks
B
all of these
C
melted rock
D
the reason volcanoes form
2) The asthenosphere is:
A
completely molten.
B
all of these.
C
the source of most magmas.
D
heated by the presence of magma.
3) When a continental plate collides with an oceanic plate, what happens?
A
Both plates are subducted into the asthenoshere
B
Both plates buckle, thicken, and push upward
C
The plates slide past one another on top of the asthenosphere
D
The oceanic plate sinks (subducts)
4) In classifying igneous rocks, which of the following is not important?
A
Mineral composition
B
Texture
C
How deep the rock was formed in the earth’s crust
D
Crystal size
5) Why is the Georgia soil red or reddish in color?
A
It has a high content of organic material
B
It is a new soil
C
It is a poorly drained soil
D
It has a high mineral content of iron
6) Characteristics for identifying minerals would include which attributes?
A
Mining, depth of formation, density, chemistry
B
Streak, hardness, color, brightness
C
Density, luster, color, cleavage
D
Silicates, fluorites, topaz, quartz
7) Obsidian is an igneous rock that
A
solidified in Earth's mantle
B
solidified very slowly to form pegmatite
C
solidified very rapidly to form glass.
D
solidified beneath Earth's surface
8) If we compare the temperature and pressure of the Earth's mantle to the core, what differences can we expect as we move downward into the Earth?
A
The temperature increases and the pressure decreases.
B
The temperature decreases and the pressure increases.
C
Both the temperature and pressure decrease
D
Both the temperature and pressure increase.
9) The point within the Earth where seismic waves originate is:
A
the epicenter.
B
the focus.
C
the origin.
D
the fault scarp
10) The fastest seismic waves are:
A
P-waves
B
all of these affect the rate of the wave
C
S-waves
D
Love waves
*select an answer for all questions
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