Seafloor Spreading

Question 1

The measurement of the depth of water in oceans, rivers, or lakes.

Answer 1

Bathymetry

Question 2

core samples from the ocean floor show that older rocks are found farther from the ridge; youngest rocks are in the mid-ocean ridge.

Answer 2

Evidence from drilling sample

Question 3

A geologic process in which tectonic plates split apart from each other.

Answer 3

Seafloor Spreading

Question 4

He outlined a theory that could explain how the continents could actually drift. This theory later became known as ‘Seafloor Spreading’.

Answer 4

Harry Hammond Hess (1906-1969)

Question 5

Rock pillows show that molten materials have erupted continuously from mid-ocean ridge and cooled quickly.

Answer 5

Evidence from molten materials

Question 6

In Ancient times, they use ___________ to measure the depth of water

Answer 6

Lead & Line

Question 7

A device that bounces sound waves off underwater object and then record the echoes of these soundwaves.

Answer 7

Sonar/Sound Navigation and Ranging

Question 8

Rocks that make up the ocean floor lie in a pattern of magnetized stripes which hold a record of the reversals in magnetic field.

Answer 8

Evidence from magnetic strip

Question 9

Method by which the depth of particular body of water is measured.

Answer 9

Depth Sounding