The name of the supercontinent that was all modern continents joined together
What is Pangaea?
100
An undersea mountain chain where new ocean floor is produced
What is a Mid-Ocean Ridge?
100
True or False: oceanic crust near the mid-ocean ridge is younger than crust farther away from the ridge.
What is True?
100
This is the meaning of the prefix "sub".
What is "beneath"? (What is "below"? What is "under"?)
100
the process by which molten material adds new oceanic crust to the ocean floor.
What is a seafloor spreading?
200
Fossils of the same organism found on different continents separated by ocean is this type of evidence.
What is fossil ? (fossil evidence)
200
This device/method is used to map the ocean floor.
What is Sonar?
200
True or False: Molten material provided evidence of Sea-Floor Spreading. Strange shaped rocks were discovered down in the Mid-Ocean Ridge.
What is true.
200
The process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle.
What is subduction?
200
the trace of an ancient organism preserved in rock
What is a fossil?
300
Mountain ranges on Africa and South America line up. This is an example of this type of evidence.
What is land features? (evidence from land features)
300
The scientist who proposed the concept of Sea-Floor Spreading
Who is Harry Hess?
300
At what underwater feature is oceanic crust "destroyed," or returned into the mantle to be recycled.
What is a deep-sea trench.
300
This ocean is shrinking because subduction is taking away ocean floor faster than sea-floor spreading can make new ocean floor.
What is Pacific (Ocean)?
300
a system for the detection of objects under water and for measuring the water's depth by emitting sound pulses and detecting or measuring their return after being reflected
What is sonar?
400
Deep scratches in rocks showed that continental glaciers once covered South Africa. This is an example of is this type of evidence.
What is climate? (climate change/evidence from climate)
400
This substance erupts through the mid-ocean ridge and then hardens to form new ocean floor.
What is molten material? (What is magma?)
400
____ in the rock of the ocean floor show the direction of Earth's magnetic field at the time the rock hardened.
What is magnetic stripes?
400
This ocean is expanding because sea-floor spreading is making new ocean floor faster than subduction takes away ocean floor.
What is Atlantic (Ocean)?
400
a dark, dense, igneous rock with a fine texture, found in oceanic crust.
What is basalt?
500
All continents were once joined together in a single landmass and have since drifted apart.
What is Continental Drift? (What is the Theory of Continental Drift?)
500
This is where the youngest ocean floor is found.
What is at the Mid-Ocean Ridge?
500
The "Glomar Challenger" drilling ship gathered samples from the ocean floor. Scientists found that the farther away from a Mid-Ocean Ridge rock samples were taken, the ____ the rocks were.
What is "older"?
500
Subduction occurs along a ______.
What is a Deep-Ocean Trench?
500
the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle.