click below
click below
Normal Size Small Size show me how
Ch. 3 Sec. 2
Volcanic Activity
Question | Answer |
---|---|
Pocket of magma beneath Earth's surface. | Magma Chamber |
A long tube into the ground that connects the magma chamber to Earth's surface. | Pipe |
Opening of a volcano where magma is forced up. | Vent |
Melted rock flowing on the surface of the Earth. | Lava Flow |
Circular depression at the top of a volcano. | Crater |
A material found in magma that is formed from the elements oxygen and silicon. | Silica |
A hot, fast-moving type of lava that hardens to form smooth, rope-like coils. | Pahoehoe |
A slow-moving type of lava that hardens to form rough chunks; cooler than pahoehoe. | AA |
A super-heated cloud of ash, gas and rock. | Pyroclastic Flow |
A volcano that is currently erupting or likely to erupt. | Active Volcano |
When it is not erupting but capable of erupting in the future. | Dormant Volcano |
A volcano that no longer erupts and is in the process of eroding. | Extinct Volcano |
A pool of groundwater that has risen to the surface after being heated by a nearby body of magma. | Hot Spring |
Fountain of water and steam that erupts from the ground. | Geyser |
Underground heat warms water, and steam turns turbines and generators. | Geothermal |