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
Scientists dived to the ocean floor in a small submarine built to withstand the crushing pressure of deep ocean. This is its name.
What is Alvin?
100
This is the meaning of the prefix "sub".
What is "beneath"? (What is "below"? What is "under"?)
100
a slowly moving mass of ice formed by the accumulation and compaction of snow
What is a glacier?
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
Molten material provided evidence of Sea-Floor Spreading. Strange rocks shaped like these were discovered down in the Mid-Ocean Ridge.
What is pillows and toothpaste squeezed from a tube?
200
The process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle.
What is subduction?
200
the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast 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
Strange rock shapes provided evidence for Sea-Floor Spreading because such rocks form only when what happens?
What is "when molten material hardens quickly after erupting under water"?
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
hot molten rock from the earth's crust from which solid rock is formed by cooling
What is magma?
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 sideways and downward movement of oceanic crust into the mantle where it melts and is "recycled"