A plate may include continents parts of the ocean floor, or both.

The edges of plates are called plate boundaries.

A spreading plate boundary may form when plates move apart from each other.

At a sliding plate boundary, two plates move past each other in the same direction.

Most injuries in earthquakes occur because buildings become damaged.

Gases such as water vapor and carbon dioxide are often mixed with the lava.

A volcanic island forms when a volcano reaches the surface of the water.

________ is the thinnest layer of the Earth structure.

__________ makes up all the lands of the continents.

___________ is made mostly of basalt, which is a dark green or black rock

____________ is the layer that makes up most of Earth’s material.

____________ is made mostly of iron.

Earthquakes under the ocean are called ________________.

A section of the lithosphere is called _____________.