25.3 25.4

Question 1

What is the boundary that marks the density change between layers is called

Answer 1

Discontinuity

Question 2

who can discontinuities be identified?

Answer 2

Studying seismic waves

Question 3

what is the shadow zone

Answer 3

Areas where no seismic waves have been recorded

Question 4

what is another name for a shadow zone

Answer 4

dead zone

Question 5

where is the shadow zone

Answer 5

105 and 140 degrees from the epicenter

Question 6

is the outer core a solid or liquid

Answer 6

liquid

Question 7

is the inner core a solid or liquid and why

Answer 7

It is a solid due to preasure

Question 8

what is the lithosphere

Answer 8

The crust and uppermost mantle

Question 9

what is the asthenosphere

Answer 9

a weaker plastic like layer

Question 10

what metallic materials make up the core

Answer 10

iron and nickel

Question 11

what elements make up the mantel

Answer 11

calcium, magnesium, aluminum, iron

Question 12

the measure of a of a fluids resistance to flow

Answer 12

viscosity

Question 13

chemical compound silicon dioxide SiO2 which is a common ingredient in most magma

Answer 13

Silica

Question 14

a crack in earths crust, small and have heights in the hundreds of meters range

Answer 14

Cinder cone volcanoes

Question 15

broad flat structures composed on layer and layer of magma

Answer 15

shield volcanoes

Question 16

large and steep structures often thousands of meters in hieght

Answer 16

composite volcanoes

Question 17

what is molten rocks stored inside earth called

Answer 17

Magma

Question 18

Where is the ring of fire

Answer 18

pacific ocean

Question 19

what forms when tectonic plate collide with subduction zones

Answer 19

Volcanoes

Question 20

which two specific locations can volcanic activity occur due to divergent plate boundaries

Answer 20

East Africa rift, Mid Atlantic ridge

Question 21

Do hot spots move

Answer 21

No they never move

Question 22

What are created from hotspots

Answer 22

Islands ( Hawaii )

Question 23

If a liquid has a high viscosity will it run fast or slow

Answer 23

slow

Question 24

If Magma has a lot of silica is the viscosity high or low

Answer 24

High

Question 25

what is pyroclastic material

Answer 25

any solid material that erupts from a volcano

Question 26

What is the smallest pyroclastic material

Answer 26

Ash

Question 27

What is the largest pyroclastic material

Answer 27

Blocks and bombs

Question 28

what gases come out of a volcano

Answer 28

water vapor, carbon dioxide, and sulfur dioxide

Question 29

how are volcanoes classified

Answer 29

size shape and eruption materials

Question 30

what are the volcano types

Answer 30

Cinder cone shield composite