chapter 25.3 and 25.4

Question 1

What is the boundary that marks a density change between layers

Answer 1

discontinuity

Question 2

how are discontinuity identified

Answer 2

by using size-mic waves

Question 3

What are shadow zones

Answer 3

are areas where no seismic waves are recorded

Question 4

what is another name for shadow zones

Answer 4

dead zone

Question 5

between what degrees do shadow zones fall

Answer 5

105-140 degrees

Question 6

is the outer core a solid or a liquid

Answer 6

its a liquid

Question 6

is the outer core a solid or a liquid

Answer 6

its a liquid

Question 7

is the inter core a solid or a liquid. why

Answer 7

the inter core is a solid because of the presser

Question 8

what makes up the lithosphere

Answer 8

the crust and uper most man tail

Question 9

what is the asthenosphere

Answer 9

a plastic like layer witch earths plates move

Question 10

what elements make up there the martial

Answer 10

calcium, Aluminum. lron and ,magnesium

Question 11

witch elements make up the core

Answer 11

lron and nickle

Question 12

is the measure of a fluids resistance to flow

Answer 12

viscosity

Question 13

is the chemical compound silicon dioxide, SiO2, witch is a common ingredient in most magma.

Answer 13

silica

Question 14

tend to be small,have heights in the hundreds of meters range, and have short eruptions cycles.

Answer 14

Cinder cone volcanoes

Question 15

are broad, flat structures com-posed of layers upon layer of lava flows

Answer 15

shield volcanos

Question 16

are large and steep-sided, often thousands of meters height and tens of kilometres across the base, and composed of layers of both lava and ash

Answer 16

composite volcanoes

Question 17

what is molten or liquid water stored inside earth called

Answer 17

magma

Question 18

where is the ring of fire located

Answer 18

pacific ocean

Question 19

what are two specific locations where volcanic activate accrues due divergent

Answer 19

East African rift valley, Mid Atlantic ridge

Question 20

are hot spots stationary

Answer 20

yes

Question 21

if magma has a high velocity will it contain more or less silica

Answer 21

more

Question 22

what is pyroclastic materiel

Answer 22

any solid material that erupts from volcanoes

Question 23

what is the smallest pyroclastic materiel

Answer 23

ash

Question 24

what is the largest pyroclastic material

Answer 24

blocks and booms

Question 25

what are r the types of gases that erupt from a volcano

Answer 25

water vapor, carbon dioxide, sulfur dioxide

Question 26

How are volcano classified

Answer 26

according to there size shape and material that erupts