1: How does sea-floor spreading occur? A, New materials are being added to the asthenosphere.

1 answer:

4 0

1. D. Molten material beneath Earth's crust rises to the surface.

2. A. The mid-ocean ridges
(This is asking for what form. The Andes is a mountain range in Peru)

3. C. Subduction causes the ocean floor to sink into deep ocean trenches.
(Subduction is when part of the ocean floor sinks under a deep-ocean trench and return the the mantle; this is caused by the movement of tectonic plates)

:)

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