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Sea floor spreading

Froggy Jumps

(8)
All about Harry Hess idea

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Froggy Jumps

Sea floor spreadingOnline version

All about Harry Hess idea

by Jaime Tres
1

geology

2

early 20th century hypothesis, made by Alfred Wegener, that the continents move about on Earth's surface.

3

a deep gash in the seafloor; the deepest places on Earth.

4

the direction of the Earth's magnetic field; a compass today will point north, which is normal polarity; south is reversed.

5

when the north and south magnetic poles are the same as they are now.

6

land mass above sea level.

7

the movement of material due to differences in temperature.

8

the mechanism for moving continents; the formation of new seafloor at spreading ridges pushes lithospheric plates on the Earth's surface.

9

a magnetic mineral that takes on Earth's magnetic polarity as it crystallizes.

10

the crust that underlies the oceans; thinner and denser than continental crust.

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