Volcanoes

Question 1

What determines a volcanic eruption?

Answer 1

molten rock, rock fragments, and hot gases

Question 2

What happens when magma is high in silica?

Answer 2

gases get trapped, causing a violent eruption

Question 3

What are rock fragments that are dust like?

Answer 3

volcanic ash

Question 4

What are rock fragments that are like pebbles?

Answer 4

volcanic cinders

Question 5

What are rock fragments that are streamlined shaped and still molten when they are thrown out?

Answer 5

volcanic bombs

Question 6

What are rock fragments that could be as big as a house?

Answer 6

volcanic blocks

Question 7

What are the main gases in volcanoes?

Answer 7

water vapor and carbon dioxide

Question 8

What is a dense cloud of super hot gases and rock fragments that race downhill?

Answer 8

pyroclastic flow

Question 9

Where are volcanoes found?

Answer 9

Convergent boundaries, divergent boundaries, hot spots, Ring of Fire

Question 10

Where are about 80% of the active volcanoes located?

Answer 10

Ring of Fire

Question 11

What is a large crater formed by the collapse of a volcano when magma rapidly erupts from underneath it?

Answer 11

caldera

Question 12

What is a vent through which gases escape and some lava comes out?

Answer 12

fissure

Question 13

What type of volcano is flat and low in silica?

Answer 13

shield volcano

Question 14

What type of volcano is steep and gases throw chunks of lava out?

Answer 14

cinder cone volcano

Question 15

What type of volcano is steep, high in silica, and is the most dangerous type?

Answer 15

composite volcano