5 Written Questions

1. a volcano that occurs where a pool of intensely hot magma rises toward the surface, melting rock until it breaks through the crust
2. magma that has broken through the surface of the earth
3. most powerful eruption; spews lava and blows gases, ash and debris very high into the atmosphere which can carry ash for miles
4. sloping sides; looks like an upside-down saucer
5. a mixture of cinder, ash, and rock

5 Matching Questions

1. geyser
2. Vulcanian eruption
3. volcano
4. pyroclastic flow
5. fault

1. a causes a loud explosion that sends lava, ash, cinders and gas into the air
2. b a break in the earth's surface along which rock can move
3. c hot spring that periodically blows steam and hot water into the air
4. d crack in the earth's crust through which molten rock comes to the surface
5. e an avalanche of red-hot dust and gases that race down the sides of some volcanoes

5 Multiple Choice Questions

1. volcano that has erupted in the distant past but is currently inactive
   1. vent
   2. magma
   3. dormant
   4. volcano
2. bits of crushed rock propelled from an erupting volcano
   1. lava
   2. magma
   3. ash
   4. vog
3. funnel shaped mound of volcano
   1. ash
   2. cone
   3. vent
   4. vog
4. opening in the surface of the earth through which lava flows
   1. cone
   2. vog
   3. fault
   4. vent
5. mud and rock fragments that surge down a mountain when a part of it collapses
   1. geyser
   2. extinct
   3. debris flow
   4. mud pot

5 True/False Question

1. hot spring → a volcano that occurs where a pool of intensely hot magma rises toward the surface, melting rock until it breaks through the crust
   

   True        False

2. crater → bowl shape at the top of a main vent which through the lava flows
   

   True        False

3. magma → magma that has broken through the surface of the earth
   

   True        False

4. Strombolian eruption → volcano produces a fountain of lava that runs down the side (not dangerous)
   

   True        False

5. ring of fire → a ring of volcanoes found in an area around the Pacific Ocean
   

   True        False