25.3 25.4

Question 1

what is the boundary that marks density between layers?

Answer 1

discontuity

Question 2

how are discontuinies identified?

Answer 2

seismic 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

what degrees do shadow zones fall

Answer 5

105 and 140

Question 6

it the outer core a solid or a liquid

Answer 6

liquid

Question 7

why is the inner core a solid?

Answer 7

because of the pressure

Question 8

what makes up the lithosphere?

Answer 8

its made up of the crust and the upper most mantle

Question 9

what is the asthenosphere

Answer 9

a plastic like layer which earths plates moves

Question 10

what elements make up the mantle

Answer 10

calcium,aluminium,iron,and magnesium

Question 11

what makes up the core

Answer 11

iron and nickel

Question 12

viscosity

Answer 12

is the measure of a fluid’s resistance flow

Question 13

silica

Answer 13

is the chemical compound silicon dioxide which is common ingredient most magma

Question 14

cinder cone volcanoes

Answer 14

tend to be small, have heights in the hundreds of meters range

Question 15

shield volcanoes

Answer 15

are broad flat structures composed of layers upon layers of lava flow

Question 16

composite volcanoes

Answer 16

are large steep-sided often thousands of meters high

Question 17

what is molten or liquid rock 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 location where volcanic activity occurs due to divergents

Answer 19

East African rift and the mid Atlantic ridge

Question 19

what are two specific location where volcanic activity occurs due to divergents

Answer 19

East African rift and the mid Atlantic ridge

Question 20

Are hotpots stationary

Answer 20

yes

Question 21

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

Answer 21

more

Question 22

what pyroclastic material

Answer 22

any solid material that that erupts from a volcano

Question 23

what is the smallest pyroclastic material

Answer 23

ash

Question 24

what is the largest pyroclastic material

Answer 24

blocks and bombs

Question 25

what are the types of gasses that erupt from a valcano

Answer 25

water vapor, carbon dioxide, and sulfur dioxide

Question 26

how are volcanoes classified

Answer 26

size, shape, and material that erupt form them

Question 27

what are the three types of volcanoes

Answer 27

cinder cone, shield, and compsite