Volcanoes

Question 1

Not associated with any plate boundary:

Answer 1

Hot spots

Question 2

A large and steep sided, occurs along convergent boundaries, and results from explosive eruptions

Answer 2

Composite Volcano

Question 3

Have gentle slopes of basaltic lava: they are commonly located along divergent plate boundaries and ocean hot spots:

Answer 3

Shield Volcano

Question 4

Is small and steep sided, and it erupts basaltic lava

Answer 4

Cinder Cone

Question 5

Is molten rock beneath Earth’s surface

Answer 5

Magma

Question 6

Molten rock that flows along Earth’s surface

Answer 6

Lava

Question 7

When magma erupts explosively, it can send particles of rock and glass, or____ into the air:

Answer 7

Volcanic Ash

Question 8

Magma’s resistance to flow:

Answer 8

Viscosity

Question 9

Magma contains ____ gases, including carbon dioxide and sulfur dioxide

Answer 9

dissolved

Question 10

A vent in Earth’s crust through which molten rock flows

Answer 10

Volcano

Question 11

Volcanos form along 2 boundaries:

Answer 11

Convergent and Divergent

Question 12

Geologists theorize that hot spots form over ____, which are places where hot magma rises due to convection currents in the mantle

Answer 12

plume

Question 13

Most volcanoes occur along:

Answer 13

plate boundaries

Question 14

The ____ is the area of earthquake and volcanic activity that surrounds the

Answer 14

Ring of Fire

Question 15

Most volcanos in the US occur near the ____ coast

Answer 15

Pacific

Question 16

A fast moving avalanche of hot gas, ash, and volcanic rock

Answer 16

Pyroclastic Flow

Question 17

Viscosity of lava is higher when magma has a high ____ content

Answer 17

Silica

Question 18

The release of a large amount of volcanic ash can affect Earth’s climate by blocking _____

Answer 18

sunlight

Question 19

Magma that has low silica content forms:

Answer 19

basalt

Question 20

Magma that is rich in silica content forms when the mantle mixes with:

Answer 20

Continental Crust

Question 21

What type of volcano is Mt. Saint Helens?

Answer 21

Composite

Question 22

Magma can form when:

Answer 22

there is a sinking tectonic plate

Question 23

Volcano that makes up the Hawaii Islands:

Answer 23

Shield

Question 24

Sign that a volcano will soon erupt:

Answer 24

temp. of lakes nearby

Question 25

What would be harmful to people living close to vol?

Answer 25

Ash cloud

Question 26

Cinder Cones are found:

Answer 26

Subduction zones

Question 27

Mudflow:

Answer 27

mud and water