Earth's crust is made up of relatively rigid plates that ride atop Earth's hot, semiliquid mantle. (2) The
plates are called tectonic because they're in constant motion. (3) They can move because ...
... Earth's mantle is
a very hot and semiliquid fluid called magma. (4) Volcanoes are a result of magma rising up or erupting
through a plate, particularly where plate boundaries are moving against each other. (5) Also, when plates
slide against each other, causing friction along adjacent plate boundaries, earthquakes frequently occur. (6)
Therefore, we often find volcanoes and earthquakes along plate boundaries. (7) Plates may also collide. (8)
When that happens, mountain ranges are formed. (9) For example, the collision of the plate carrying the
Indian subcontinent created the Himalayan Mountains when it collided with the Asian plate.
5. What is the topic sentence for this passage?
A. Sentence 4
B. Sentence 1
C. Sentence 2
D. There is no single topic sentence.
What is the topic sentence for this passage? Sentence 1 is the topic sentence.
(See complete conversation and new answers below)
There are no new answers.