Question

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1. what are the pieces of evidence that support hesss idea of sea - floor spreading?

1.
2.
wegener redeemed

1. scientists have found evidence of reversal patterns in

a. rocks only on the ocean floor
b. rocks only on land
c. rocks on the ocean floor and on land
d. rocks from the moon.

1. continents move over earths surface

a. by plowing through the sea floor
b. on ice sheets on the sea floor
c. by rolling on earths molten core
d. by the widening sea floor, which acts as a conveyor belt

1. the mechanism that verifies wegeners hypothesis of continental drift is

a. geomagnetic reversal
b. magnetic symmetry
c. sea - floor contracting
d. sea - floor spreading

Explanation:

1. Magnetic stripes on ocean - floor rocks show alternating magnetic polarity, indicating new crust formation during sea - floor spreading. Age of rocks increases as we move away from mid - ocean ridges, which is consistent with sea - floor spreading.
2. Scientists have found evidence of reversal patterns in rocks on the ocean floor and on land. Magnetic minerals in rocks record Earth's magnetic field at the time of their formation, and reversals are seen in both oceanic and continental rocks.
3. Continents move over Earth's surface by the widening sea floor, which acts as a conveyor belt. Sea - floor spreading pushes the continents apart as new crust is formed at mid - ocean ridges.
4. The mechanism that verifies Wegener's hypothesis of continental drift is sea - floor spreading. Sea - floor spreading provides the driving force for the movement of continents as new oceanic crust is created and pushes the existing crust (and continents) apart.

Answer:

1. 1. Magnetic stripes on ocean - floor rocks; 2. Age distribution of ocean - floor rocks
2. C. rocks on the ocean floor and on land
3. d. by the widening sea floor, which acts as a conveyor belt
4. d. sea - floor spreading