How can crust disappear at the edge of a boundary?

It is too dense and is sinking into Earth.

What is a transform boundary?

when two plates slide past one another.

What are strike-slip faults?

rocks move in the opposite directions at the same rate

large landmass in which all continents once were connected

What is the lithosphere?

plates make up the crust and the upper part of the mantle

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Tectonic Plates

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Questions 20

Answers

1
What clue supported the continental drift theory?
Fossils of animals have been found on continents.
all answers are correct
Similar rock structures have been found on continents.
a puzzle-like fit of all the continents
2
Oceanic crust is _______________ than continental crust
more dense
less dense
thicker
heavier
3
How can crust disappear at the edge of a boundary?
It is too dense and is sinking into Earth.
Gravity is pulling it down.
new crust is being added to the other edge of the boundary
Other edge of the boundary is being pulled into Earth's core
4
What is a transform boundary?
when two plates move toward each other.
when two plates slide past one another.
when two plates collide.
two plates pull away from each other.
5
What do scientists believe is the force behind the plate tectonics theory?
convection currents
the Sun's gravity
the movement of the planets
gravity slab pull
6
Trenches and Island Arcs are found ....
Divergent Continental- Continental
Convergent Oceanic- Continental
Transform- Continental- Continental
Convergent Oceanic-Oceanic
7
What happens to rock around a subducting slab?
It goes under the other plate.
It disappears from Earth.
It combines with the other rock.
It goes over the other plate
8
More dense magma
is hotter
floats to the top
is cooler
flies out of volcanoes
9
Earthquakes are caused by which of the following stresses?
Shearing
Tension
Compression
Transform
10
Who first proposed the theory of continental drift?
Harry Hess
Galileo Galilee
Harry Hess
Alfred Wegener
11
Shearing can cause which of the following to occur
Acid Rain
Volcano
Tsunami
Sea Floor Spreading
12
What are strike-slip faults?
rocks in the fault never move
same side of the fault,same direction,at different rates
opposite side of the fault,same direction,at different rates
rocks move in the opposite directions at the same rate
13
What kind of movement created the Himalaya Mountains?
divergent boundaries
reversals of Earth's magnetic field
erosion
compressional forces
14
A divergent boundary is a boundary between two plates that __________.
move away from each other
converge
move toward each other
slide along each other
15
What is the only boundary line that can create new crust?
Sea Floor Spreading
Transform boundary
Mountain Ranges
Convergent boundary
16
Anytime there is a subduction zone at a continental-oceanic plate, this will always form..
Mountain Range
Volcanic Arc
Mountain
Waterfall
17
How do scientists explain the formation of underwater mountain ranges?
seafloor spreading
strike-slip faults
convection currents
continental drift
18
What is Pangaea?
large landmass in which all continents once were connected
the largest fault found on Earth
Earth's inner core
the large landmass that all continents are currently forming
19
What is the lithosphere?
large, flat stones sitting on top of malleable magma
plates make up the crust and the upper part of the mantle
the plates that make up the crust
the upper part of the mantle
20
Rift Valleys are formed by what boundary?
Divergent
Convergent
Transform
none of the above

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