| A | B |
|---|
| a weak spot in the crust where magma has come to the surface | volcano |
| the molten mixture of rock-forming substances, gases, and water from the mantle | magma |
| liquid magma that reaches the surface | lava |
| a major belt of volcanoes that rims the Pacific Ocean | Ring of Fire |
| a string of islands formed by the volcanoes along a deep-ocean trench | island arc |
| an area where magma from deep within the mantle melts through the crust above it | hot spot |
| a substance that cannot be broken down into other substances | element |
| a substance in which two or more elements are chemically joined | compound |
| any characteristic of a substance that can be observed or measured without changing the composition of the substance | physical property |
| any property of a substance that produces a change in the composition of matter | chemical property |
| the resistance of a liquid to flowing | viscosity |
| a material found in magma that is formed form the elements oxygen and silicon | silica |
| a hot, fast-moving type of lava that hardens to form smooth, ropelike coils | pahoehoe |
| a slow-moving type of lava that hardens to form rough chunks | aa |
