6
QuizMultiple Choice

Lab: Plate Boundaries and Movement — Unit test

Question 6 • PARTA - EVP: PGCPS BIOGEOCHEM CR (FALL2026) - 798113

Which statement explains what happens to older crust during seafloor spreading?

Answer
A
It is destroyed at coastlines.
B
It moves under continents.
C
It is destroyed at a mid-ocean ridge.
D
It moves away from a mid-ocean ridge.

Explanation

At a mid-ocean ridge, magma rises and cools to form new oceanic crust. As more new crust forms, older crust is pushed farther away from the ridge. Therefore, older crust moves away from a mid-ocean ridge.

AI-written and checked against the verified answer.

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