Question

Lesson Review

Write true if the statement is true. If the statement is false, change the underlined term to make the
statement true.
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The two kinds of crust are oceanic crust and land.
The underwater mountain chain is called the mid-ocean ridge.
Iceland is part of the Mid-Pacific Ridge.
Oceanic crust near the mid-ocean ridge is older than crust farther away.
The deep crack running down the center of an ocean ridge is called a
trench.
New continental crust is formed at the mid-ocean ridges.
Sea-floor spreading is a process that forms new oceanic crust.

Answer 1

The two kinds of Earth's crust are oceanic and continental, not land. Iceland is part of the Mid-Atlantic Ridge, not the Mid-Pacific Ridge. Oceanic crust near mid-ocean ridges is younger, not older, and the deep crack is called a rift, not a trench.

Step-by-step explanation:

The two kinds of crust on Earth's surface are oceanic crust and continental crust. If the statement is false, change "land" to "continental crust" to make the statement true.

The mid-ocean ridge is an underwater mountain chain, so the statement is true.

Iceland is not part of the Mid-Pacific Ridge but rather the Mid-Atlantic Ridge. Changing "Mid-Pacific Ridge" to "Mid-Atlantic Ridge" would make the statement true.

The oceanic crust near the mid-ocean ridge is younger than crust farther away because new crust is constantly being formed at the ridges. To correct the statement, change "older" to "younger".

The deep crack running down the center of an ocean ridge is actually called a rift, not a trench. Change "trench" to "rift" to make the statement true.

New oceanic crust is formed at the mid-ocean ridges. To correct the statement, change "continental crust" to "oceanic crust".

Sea-floor spreading is indeed a process that forms new oceanic crust, so the statement is true.