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Sea Floor Spreading

Author: Martin
Across
What cause sea floor spreading and subduction
A long, narrow and very deep underwater canyon
What type of lines are on the ocean floor
What happens when magma rises and sits on top of the ridge
When a plate goes under another its usually called a subduction...
What forms when molten material melts and then cools
When the lava comes up it forms what
The rock that oceanic crust is made of
When the lava cools it goes where
When 2 ocean plates collide and one goes underneath creating a trench
Down
Zebra lines that run across the sea floor
Where subduction and sea floor spreading all happen
Where new crust comes from
What ocean is shrinking
When we drill for evidence it gives us these
What kind of rocks are closest to the ridge
A device that bounces waves off of underwater objects
What ocean is growing
The rock that continental crust is made from
Rock that's furthest away from the ridge