Volcanoes Section 1&2🌋

Question 1

Magma is a molten mixture of

Answer 1

Rock gas and water vapor

Question 2

Volcanoes for in belts what is the largest called?

Answer 2

Ring of fire

Question 3

The divergent boundary is where

Answer 3

Crust pulls apart and new crust is added

Question 4

Convergen plate boundaries is where…

Answer 4

Ocean crust and returns to the mantle

Question 5

Subduction causes ocean crust to sink in trenches back into the mantle where it melts and rises back as…

Answer 5

Volcanoes

Question 6

Oceanic/continental forms

Answer 6

Volcanic mountain ranges

Question 7

Magma reaches the surface and erupts…

Answer 7

Through the crust

Question 8

Melts through crust like

Answer 8

Blow torch

Question 9

Can form a chain of volcanic mountains or islands as the plate moves over

Answer 9

The hot spot

Question 10

What are physical properties?

Answer 10

Detectable without changing the composition of a substance

Question 11

What is a chemical property

Answer 11

Property that produces a change in the composition

Question 12

High viscosity=

Answer 12

Slower flowing

Question 13

Viscosity depends on

Answer 13

Silica content and tempature

Question 14

70% of magma is

Answer 14

Silica

Question 15

More silica=

Answer 15

Higher viscosity

Question 16

Higher viscosity=

Answer 16

Light colored sticky

Question 17

High colored sticky=

Answer 17

Rhyolite

Question 18

Dark colored flows easily=

Answer 18

Basalt

Question 19

Tempature of magma

Answer 19

750°-1175°C

Question 20

Volcanic glass fibers and globs of volcanic glass is called

Answer 20

Peles hairs and tears

Question 21

Where does magma form

Answer 21

Athenosphere

Question 22

Where does magma collect under high pressure

Answer 22

Magma chamber

Question 23

What happens to the presure as the magma nears the surface

Answer 23

It decreases

Question 24

What is Lahar

Answer 24

,ud,ash,and tons of debris flowing doenstream