Seventh grade Inside Earth Section 1.4 Science quiz
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What technology did scientists use to map the mid-ocean ridge?
What happens at the mid-ocean ridge?
What did drilling samples tell scientists?
That the farther the rock was away from the mid-ocean ridge, the older it was.
What did the submersible see when it observed the mid-ocean ridge?
Volcanic rock shaped like toothpaste from out of a tube, or pillows
What is subduction?
When rock is pulled into a trench and into Earth's asthenosphere where it then melts and becomes part of the asthenosphere.
What is sea-floor spreading?
When magma from earth's asthenosphere comes out from a mid-atlantic ridge and adds to the sea floor
what happens at a deep-ocean trench?
Why is older crust denser than new crust?
it is cooler
What is the longest chain of mountains in the world?
What are the three types or evidence for sea-floor spreading?
molten material, magnetic striped, and drilling samples
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