Vocabulary
melted rock below Earth's surface
magma
The San Andreas Fault is a crack in Earth's crust where a volcano occurred.
False.
The San Andreas Fault is a crack in Earth's crust where movement takes place.
What is the type of activities that occur in divergent boundaries?
a. earthquakes
b. mid-ocean ridges
c. rift valleys
d. sea-floor spreading
e. all of the above
e. all of the above
The movement is so slow that you don't notice it.
The edge of a tectonic plate
Plate Boundary
Huge amount of soil and rock are pushed ahead by glaciers.
True.
Glaciers have been one impotent agent of change. As they advance and retreat, they slowly grind rock and sculpt the land (p. 88).
a. volcanoes
b. trenches
c. earthquakes
d. mountains
e. all of the above
e. all of the above
What causes Earth's tectonic plates to move?
The asthenosphere, the upper part of Earth's mantle, contains many slow-moving convection currents. These currents move the tectonic plates above them.
the transfer of thermal energy by the mass movement in a fluid, such as air, water, or molten rock
Convection current
Lithosphere gives clues about themselves and Earth long ago.
False.
Fossils
a. faults
b. earthquakes
c. volcanoes
d. all of the above
a. faults & b. earthquakes
What events can occur when plates move?
Earthquakes and volcanoes can occur when plates move. Plate movement builds mountains over time.
fault
Some fossils provide clues to the climate and environment in which the organism lived.
True.
For example, a fossil of a tropical fern indicates that the land was once warm, humid, and marshy.
Which is the molten rock that pushes toward Earth's surface?
a. hot gases
b. pressure
c. lava
d. magma
d. magma
What are the two pieces of evidence for the theory of plate tectonics?
evidence 1: Feature on Earth such as faults, mountains, and rift valleys.
evidence 2: The mid-ocean ridges and the magnetic properties of the layers of rock on either side of the ridges.
the sinking of one tectonic plate under another tectonic plate
subduction
Tectonic plates float upon the core.
False.
Tectonic plates float upon asthenosphere.
When sections of Earth's crust come together, move apart, or slide past each other a(n) ______ occurs.
a. earthquake
b. landslide
c. mudslide
d. rockslide
a. earthquake
What are four pieces of evidence that support Wegener's hypothesis of continental drift?
evidence 1: The coastlines of South America and Western Africa appear to fit together.
evidence 2: Fossils from the same plant and animal species were uncovered in both South America and western Africa.
evidence 3: Deposits from glaciers were discovered in places that now have warm weather all year long.
evidence 4: Mountain ranges across North America and Western Europe seemed to link up, as if these landmasses were once connected.