The Changing Earth Question Preview (ID: 43239)
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Earth's crust and upper mantle are broken into pieces called __________.
a) continents
b) basins
c) tectonic plates
d) faults
Which statement summarizes the theory of plate tectonics?
a) Only the continents move, traveling slowly over and through Earth’s crust.
b) All of the continents were once joined together into a single supercontinent.
c) The continents are fixed and have always been located in their present positions.
d) Earth’s crust is made of pieces that move slowly over, against, and apart from each other.
The movement of tectonic plates is believed to be caused by __________.
a) convection currents in the mantle
b) Earth's magnetic field
c) the rotation of Earth
d) the gravitational pull of the moon
Where do most earthquakes and volcanoes occur?
a) in the centers of continents
b) along the edges of tectonic plates
c) along the equator
d) in the polar regions
Many earthquakes occur in California because ________.
a) California is sinking into the ocean
b) California has many volcanoes
c) a tectonic plate boundary runs through California
d) California is hit by many meteorites
Why would it be more likely that you would see lava as opposed to magma?
a) Lava is the term for magma after it has flowed out of the ground.
b) Magma is much hotter than lava so you cannot see it as well.
c) Magma can only be found and seen at the bottom of the ocean.
d) Magma is much darker in color than lava so it is harder to see.
What causes rock to change into magma?
a) extreme heat below Earth's surface
b) weathering of the rock
c) erosion from rain and wind
d) cooling and hardening
Which of the following features is found along divergent plate boundaries?
a) folded mountains
b) ocean trenches
c) island arcs
d) mid-ocean ridges
At transform boundaries, tectonic plates _______.
a) move apart
b) slide past each other
c) collide
d) do not move
Convergent plate boundaries ________.
a) pull apart
b) slide past each other
c) collide
d) do not move
Which of the following features is created when tectonic plates collide?
a) buttes
b) mesas
c) sinkholes
d) folded mountains
Movement of rock particles by wind, water, ice, or gravity is called _________.
a) erosion
b) weathering
c) landslide
d) oxidation
The breaking down of rock and other substances at Earth's surface is known as _______________.
a) erosion
b) weathering
c) creep
d) slump
Ice, wind, water, gravity, plants, and animals are all agents of
a) chemical weathering
b) mechanical weathering
c) oxidation
d) desertification
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