Earth Science Question Preview (ID: 3311)
Mid Year Review.
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Magma is:
a) melted rock
b) the source of all igneous rocks
c) the reason volcanoes form
d) all of these
The asthenosphere is:
a) the source of most magmas.
b) completely molten.
c) heated by the presence of magma.
d) all of these.
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)
In classifying igneous rocks, which of the following is not important?
a) Mineral composition
b) How deep the rock was formed in the earth’s crust
c) Crystal size
d) Texture
Why is the Georgia soil red or reddish in color?
a) It has a high content of organic material
b) It is a poorly drained soil
c) It has a high mineral content of iron
d) It is a new soil
Characteristics for identifying minerals would include which attributes?
a) Streak, hardness, color, brightness
b) Density, luster, color, cleavage
c) Silicates, fluorites, topaz, quartz
d) Mining, depth of formation, density, chemistry
Obsidian is an igneous rock that
a) solidified very rapidly to form glass.
b) solidified very slowly to form pegmatite
c) solidified beneath Earth's surface
d) solidified in Earth's mantle
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) Both the temperature and pressure increase.
b) Both the temperature and pressure decrease
c) The temperature decreases and the pressure increases.
d) The temperature increases and the pressure decreases.
The point within the Earth where seismic waves originate is:
a) the epicenter.
b) the fault scarp
c) the origin.
d) the focus.
The fastest seismic waves are:
a) P-waves
b) S-waves
c) Love waves
d) all of these affect the rate of the wave
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