Hey Bot, A convergent plate boundary is where plates push together. Most volcanoes form at this type of boundary. High mountains also form at convergent boundaries, as continental crust is smashed and folded together. Earth’s highest mountains, the Himalayas, formed where two continental plates collide.(2 points)

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A process called subduction occurs where two plates of different densities meet. Subduction occurs when one plate pushes down under the other. The denser plate dives beneath, while the less dense plate rides over the top. Look at the diagram below. Here the denser oceanic plate dives under the less dense continental plate.(2 points)

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A divergent plate boundary is where plates pull apart. Most divergent boundaries happen in the ocean. Hot magma rises to the surface in the gap between the plates. Sea water cools the magma, which then becomes solid rock. This new sea floor spreads away from the plate boundary as a ridge on both sides. (2 points)

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A transform plate boundary is where two plates slide past each other horizontally. Earth’s crust is cracked and torn in these areas, often causing earthquakes. The plates sometimes get stuck. When they snap forward with a jolt, the ground shakes. The San Andreas Fault sits along a well-known transform plate boundary in California. Some of the state’s major earthquakes have occurred along this 800-mile-long (1300 km long) fault line.(2 points)

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The cell theory that Earth’s crust is composed of several rock plates which move across Earth’s surface.(2 points)

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