| Definition | Term |
| Lava that is cool and slow moving | |
| As the temperature of magma decreases, its viscosity _____. | |
| A tall, cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials | |
| Boundary where two plates move together | |
| Where volcanic belts form | |
| When magma squeezes between horizontal layers of rock, it forms this | |
| A mass of rock formed when a large body of magma cools inside the crust | |
| A major volcanic belt formed b y the many volcanoes that rim the Pacific Ocean | |
| A wide, gently sloping mountain made of layers of lava and formed by quiet eruptions. | |
| Forms when magam hardens in a volcano' pipe | |
| Density, harndess, melting point, boiling point, and magnetism are all this type of property | |
| Pebble-sized particles that come out of a volcano | |
| A bowl-shaped area that may form at the top of a volcano around the central vent | |
| Boundary where two plates move apart | |
| A substance that cannot be broken down into other substances | |
| A long tube in the ground that connects the magma chamber to Earth's surface | |
| Magma that is low in silica produces this type of eruption | |
| The huge hole left by the collapse of a volcanic mountain | |
| This occurs when an explosive eruption hurls out a mixture of hot gases, ash, cinders, and bombs | |
| ________ among a liquid's particles causes liquids to have different viscosities. | |
| When magma reaches the surface, this is what it's called | |
| The resistance of a liquid to flowing | |
| Opening in a volcano where molten rock and gas leave | |
| An area where material from deep within the mantle rises and then melts, forming magma | |
| The less silica magma contains, the _____ its viscosity. | |