The Deep Ocean Floor
Mid-Ocean Ridges
Sea-Floor Spreading
Evidence of Sea-Floor Spreading
100
The temperature deep in the ocean.
What is near freezing?
100
The length of the mid-ocean ridge.
What is 50,000 kilometers?
100
The scientist that studied mid-ocean ridges?
What is Harry Hess?
100
The submarine that was built to withstand the crushing pressures down in the ocean to collect data.
What is Alvin?
200
Where bizarre creatures live?
What is hot-water vents?
200
An undersea mountain chain where new ocean floor is produced.
What is mid-ocean ridge?
200
Where the floor is continually adding new material.
What is sea-floor spreading?
200
This evidence shows the direction of the Earth's magnetic field at the time the rock hardened.
What is magnetic stripes?
300
How the water is heated.
What is hot material from the mantle?
300
A device that bounces sound waves off underwater objects and then records these sound waves.
What is sonar?
300
The ocean floor moves like what?
What is a conveyor belt?
300
Poles that act like a giant magnet.
What is the South and North Pole?
400
True or False: Deep in the ocean there is no form of life.
What is false?
400
True or False: All of the mid-ocean ridges lie hidden beneath the water.
What is false?
400
The sea-floor spreading begins where?
What is the oceanic crust?
400
The ocean floor contains mostly of this.
What is iron?
500
Bizarre animals that live near the hot-water vents?
What is red-tipped tube worms, giant clams, spider-like crabs?
500
One of the few places that the ridge can be seen above surface.
What is Iceland?
500
Forms a strip of solid rock in the center of the ridge.
What is the cooled molten material?
500
The drilling ship that gathered samples through pipes to tell the age of the rocks underwater.
What is Glomar Challenger?
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