| A | B |
|---|
| Composition | the ___ of the magma is a factor that affects a volcano's eruption |
| vent | volcanoes form when magma flows out of a surface opening called a ___ |
| sulfurous | this type of gas can create acid rain |
| volcano | opening in Earth that erupts gases, ash and lava |
| divergent | Mid-Atlantic ridge where plates move apart is called a ____ boundary |
| convergent | at ____ boundaries, volcanoes tend to erupt more violently |
| water vapor | the amount of this is a factor that affects a volcano's eruption |
| hot spot | the boundary between Earth's mantle and core create ____ |
