Continental Drift
Sea-Floor Spreading
Evidence for Sea-Floor Spreading
Your Guess is as Good as Mine
Say What??
100
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
Remains found in rock 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
Molten material provided evidence of Sea-Floor Spreading. What shape did the rocks discovered near the Mid-Ocean Ridge form?
What is pillow shaped
200
Which layer within the mantle is slow flowing. (The layer the tectonic plates float on)
What is asthenosphere?
200
the trace of an ancient organism preserved in rock
What is a fossil?
300
__________ on Africa and South America line up.
What is land features/mt ranges? (evidence from land features)
300
The process of new rock being formed and pushing older rock toward the deep ocean trench.
What is seafloor spreading
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 layer is composed of crust and upper mantle
What is lithosphere?
300
List the three compositional layers
What is crust mantle core?
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 today's warm 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 part of the core is liquid
What is outer core?
400
a dark, dense, igneous rock with a fine texture, found in oceanic crust.
What is basalt?
500

This theory states that "All continents were once joined together in a single landmass and have since drifted apart."

What is Theory 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
Which element makes up most of the core?
What is a Iron?
500

Iceland is growing in size. Although, Iceland will never reach Greenland. Why is this the case? 

Iceland is pushing Greenland to the west as well. Also acceptable is that the Atlantic Ocean does not have any trenches. 

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