ch.23

Question 1

what is the boundary that marks the density change

Answer 1

discontinuity

Question 2

how can discontinuity be identified

Answer 2

by using sic mic waves

Question 3

what is a shadow zone?

Answer 3

where no size mic waves have been reported

Question 4

what is another name for shadow zones

Answer 4

dead zone

Question 5

what are the degree from an eppasenter that shadow zones fall???

Answer 5

105 and 140 degrees

Question 6

what can p-waves and s-waves travel through

Answer 6

p-waves can go through a solid and a liquid

s-waves can go through a solid

Question 7

is the outer core a solid or a liquid

Answer 7

the outer core is a liqud

Question 8

is the inner core a sold or a liquid

Answer 8

it is a solid do to the presser

Question 9

what is a lit ho spear

Answer 9

the crust and the upper most mantel

Question 10

what is the asthenosphere

Answer 10

its a plastic like layer that the plates move on

Question 11

what mat italic mate riles make up the core

Answer 11

iron and nickle make up the core

Question 12

what elements make up the mantel

Answer 12

calcium, aluminum, iron,magnesium.

Question 13

viscosity

Answer 13

is the measure of fluids rest-ant to flow .

Question 14

silica

Answer 14

is the chemical compound silicon dioxide , SiO 2 , which is a common ingredient in the magma

Question 15

cinder cone volcanoes

Answer 15

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

Question 16

shield volcanoes

Answer 16

are broad, flat structures composed of layer of lava flows

Question 17

composite volcanoes

Answer 17

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

Question 18

what is molten or liquid rocks stored in the earth

Answer 18

magma

Question 19

where is the ring of fire located

Answer 19

the ring or fire is located in the pacific ocean

Question 20

what forms do tectonic plates collied substitution zones

Answer 20

volcanoes

Question 21

which two locations can volcanic activity happen due to divergents

Answer 21

the mid-Atlantic ridge

and the east African ridge

Question 22

are hot spots stationary/ do they move

Answer 22

no they are in a set location/ they are stuck in a spot

Question 23

what are created from hot spots

Answer 23

volcanic islands/ Hawaii

Question 24

if a liquid has a high viscosity will it run faster or slower

Answer 24

it will run slower

Question 25

if a magma has a high viscosity dose it have more or less silica

Answer 25

it contains more silica

Question 26

what is pyroclastic materiel

Answer 26

ash

Question 27

what are the largest Pyroclastic material what are the types of gases that come from a volcano

Answer 27

blocks and bombs water vapor,carbon dioxide and sulfur dioxide

Question 28

how are volcanoes classified

Answer 28

there size shape and the materials they erupt

Question 29

what are the three types of volcanoes

Answer 29

cinder cones ,shield,composite volcano