Drifting Continents 3.1
Sea-Floor Spreading 3.2
Boundaries
Plate Tectonics 3.3
Miscellaneous
100
The name of the supercontinent that existed millions of years ago?
What is Pangaea.
100
What technology did scientists use in the mid-1900s to map the mid-ocean ridge? a. satellites c. submarines b. deep-sea diving d. sonar
What is D sonar.
100
A place where two plates slip past each other, moving in opposite directions, is known as a a. transform boundary. c. convergent boundary. b. divergent boundary. d. rift valley.
What is b. divergent boundary.
100
The geological theory that states that pieces of Earth’s lithosphere are in constant, slow motion is the theory of a. subduction. c. deep-ocean trenches. b. plate tectonics. d. sea-floor spreading.
What is b. plate tectonics.
100
In our plate tectonics lab, what did the graham cracker represent?
What is the continental crust.
200
Alfred Wegener provided evidence from landforms, fossils, and climate in support of his theory of THE SHRINKING EARTH>
What is false, continental drift.
200
In sea-floor spreading, molten material rises from the mantle and erupts a. along the edges of all the continents. b. along mid-ocean ridges. c. in deep-ocean trenches. d. at the north and south poles.
What is b. along mid-ocean ridges.
200
If plates are slipping part each other they are _________________ __________________.
What is transform boundaries.
200
The lithosphere is broken into sections called ____________________, which float on top of the asthenosphere.
What is plates.
200
TRUE/FALSE Mid-ocean ridges form the longest mountain ranges on Earth.
What is TRUE.
300
According to Wegener’s hypothesis of continental drift, a.Earth’s surface is made up of seven major landmasses. b the continents do not move. c. Earth is slowly cooling and shrinking. d. the continents were once joined together in a single landmass.
What is D.
300
Subduction occurs where the oceanic crust bends down toward the mantle at a(n) _________________________.
What is deep-ocean trench
300
A collision between two pieces of continental crust at a converging boundary produces a a. mid-ocean ridge. c. rift valley. b. deep-ocean trench. d. mountain range.
What is mountain range.
300
TRUE/FALSE Oceanic crust near the mid-ocean ridge is younger than oceanic crust farther away from the ridge.
What is TRUE.
300
When the ocean floor sinks below the deep ocean trench and sinks into the mantle is known as ____________.
What is subduction.
400
Any trace of an ancient organism that has been preserved in rock is called a a. landform. c. fossil. b. continent. d. landmass.
What is fossil.
400
TRUE/FALSE If subduction occurs faster than oceanic crust can be created, an ocean will EXPAND.
False, shrink
400
Along a DIVERGENT BOUNDARY, two plates slip past each other, moving in opposite directions.
What is FALSE, TRANSFORM BOUNDARY.
400
When continental plates pull apart at a divergent boundary on land, a(n) __________ __________ forms.
What is rift valley.
400
How does a deep-ocean trench form?
What is when two plates of different densities collide. The oceanic crust is denser and plunges beneath the continental crust, forming a trench.
500
Most geologists think that the movement of Earth’s plates is caused by a. conduction. b. earthquakes. c. convection currents in the mantle. d. Earth’s magnetic field.
What is c. convection currents in the mantle.
500
The process of _____________ ____________ continually adds new crust to the ocean floor along both sides of the mid-ocean ridge.
What is sea-floor spreading.
500
Draw a convergent boundary, including the arrows to show the motion of the plates.
What is both plates should be moving toward each other. One plate should be moving downward while the other should be over the plate.
500
According to the theory of plate tectonics, explain what causes changes in Earth’s surface.
What is according to the theory of plate tectonics, the lithosphere is made up of a number of plates that contain oceanic and continental crust. These plates are in constant slow motion, driven by convection currents in the mantle. As they move, the plates collide, pull apart, or grind past each other, creating landforms on Earth’s surface.
500
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