Volcanoes

Question 1

hotspots

Answer 1

a small area of the Earth’s crust where an unusually high heat flow is associated with volcanic activity

Question 2

volcanoes built up by

Answer 2

lava, volcanic bombs, tephra, lapilli, lahars, pyroclastic flows

Question 3

tephra

Answer 3

airborne ash and dust

Question 4

lapilli

Answer 4

small stones that fall out of the air during volcanic eruptions

Question 5

lahars

Answer 5

mudflows of pyroclastic material

Question 6

guyots

Answer 6

an undersea mountain with a flat top

Question 7

VEI

Answer 7

volcanic explosivity index, depends on how much volcanic material is thrown out, to what height and how long the eruption lasts
scale is logarithmic 0-8

Question 8

Volcanoes

Answer 8

Conical hills or mountains built around a vent connected to reservoirs of molten rock below earths surface
1500 active

Question 9

Rhyolitic lava

Answer 9

Highly viscous lava that can just barely flow
Less hot
Very explosive due to trapped gas bubbles
Produce a volcanic dome destroyed in explosion as lava tries to escape

Question 10

molten rock beneath the surface

Answer 10

magma

Question 11

molten rock above the surface

Answer 11

lava

Question 12

nuees ardentes

Answer 12

A fast-moving cloudlike mass consisting of gases, hot ash, and other material ejected from an erupting volcano