Question

3. If the speed of the seafloor spreading is constant, explain which can affect the width of the stripes?


4. If Earth did not have reversals of its magnetic field, what would scientists see on the seafloor which will indicate that it is spreading?​

Answer 1

Explanation:

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Seafloor spreading helps explain continental drift in the theory of plate tectonics. When oceanic plates diverge, ...

....

History of study

Answer 2

Answer:

• 3..The increased rate of seafloor spreading caused sea level to rise. Increasing the rate of seafloor spreading inflates the ridge. Hot, young lithosphere is forming and moving away from the ridge at a faster rate and moves a greater distance from the ridge before it cools and contracts. ... So sea level rises.

Explanation:

• 4...In 1966, earth scientists first identified the Jaramillo Event, the wholesale reversal of Earth's magnetic fields some 900,000 years ago. ... They realized that the pattern of reversals matched perfectly the magnetic profile they had compiled of the sea floor.
• A polarity reversal means that the magnetic North flips to where we know the South Pole is. ... This creates a symmetrical pattern of magnetic stripes of opposite polarity on either side of mid-ocean ridges. These patterns of stripes provide the history of seafloor spreading.