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Gen Sci Ch 31
Test Description: Plate tectonics
Instructions: Answer all questions to get your test result.
1) Isostacy is
A
the process of magnetic reversal
B
the amount of matter in a set amount of space
C
the horizontal movement of the crust
D
the vertical movement of the crust
2) Our knowledge of the core is based on
A
all of the above
B
seismology
C
drilling directly into it
D
studying hydrothermal vents
3) 4.6 billion years ago, Earth became sorted into density-based layers in the process of
A
seafloor spreading
B
isostacy
C
differentiation
D
magnetic reversal
4) Seafloor spreading was the hypothesis of
A
Harry Hess
B
Alfred Wegener
C
Albert Einstein
D
Alfred Nobel
5) Seafloor spreading is __ the rate of subduction.
A
equal to
B
less than
C
all of the above, depending on the time of year
D
greater than
6) The sinking of the oceanic lithosphere into the asthenosphere
A
subduction
B
plate tectonics
C
continental drift
D
isostacy
7) Which is not something that pushes seafloor apart?
A
convection
B
radiation
C
none of the above
D
gravity
8) Two plates moving past one another is a
A
transform boundary
B
impossibility
C
convergent boundary
D
divergent boundary
9) Which layer is NOT a layer based on composition?
A
mantle
B
crust
C
core
D
lithosphere
10) Meteorology is the study of
A
volcanoes
B
space
C
weather
D
meteors
11) Organisms in ocean trenches get energy from
A
the cold water
B
chemosynthetic organisms
C
nothing can live in ocean trenches
D
photosynthetic organisms
12) The innermost layer of Earth is
A
liquid
B
solid
13) The layer that is composed of the crust and the upper mantle
A
asthenosphere
B
crustle
C
mantust
D
lithosphere
14) the process by which new lithosphere is created at midocean ridges as older lithoshere moves away
A
transform boundaries
B
seafloor spreading
C
convergent boundaries
D
divergent boundaries
15) We are able to study the mantle by
A
drilling directly through the crust and accessing the mantle
B
all of the above
C
sampling molten rock from volcanic vents
D
observing Earth's magnetic field
16) Earth's innermost layer, which is mostly iron and includes the inner core and outer core
A
asthenosphere
B
lower mantle
C
crust
D
core
17) separate pieces of lithosphere that move on top of the asthenosphere
A
mantles
B
density
C
tectonic plates
D
landbridges
18) the study of the history, structure, and natural processes of planet Earth
A
darkness
B
very cold
C
high pressure
D
all of the above
19) What are conditions like in ocean trenches?
A
Earth science
B
geography
C
astronomy
D
Life science
20) What was not evidence of continental drift?
A
the continents look like they fit together like a puzzle
B
landbridges
C
the same kinds of fossils being found on several continents
D
matching rock formations
*select an answer for all questions
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