25.3 25.4

Question 1

what is the boundary that marks the density change?

Answer 1

the discontinuity

Question 2

how can discontinuities be identified?

Answer 2

seismic waves

Question 3

what is a shadow zone?

Answer 3

where no seismic waves have been recorded.

Question 4

whats another term for a shadow zone?

Answer 4

dead zone

Question 5

what are the degrees from an epicenter that shadow zones fall?

Answer 5

105-140 degrees

Question 6

is the outer core a solid or a liquid?

Answer 6

liquid

Question 7

is the inner core a liquid or a solid?

Answer 7

solid

Question 8

is the inner core a solid or a liquid? Why?

Answer 8

A solid due to the pressure.

Question 9

what is a lithosphere?

Answer 9

the crust and the uppermost mantle.

Question 10

what is the asthenosphere?

Answer 10

a weaker plastic like layer that the plates move on

Question 11

what metallic materials make up the core?

Answer 11

iron and nickel.

Question 12

what elemnts make up the mantle?

Answer 12

calcium, magnesium, iron, aluminium

Question 13

The measure of a fluids resistance to flow

Answer 13

Viscosity

Question 14

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

Answer 14

silica

Question 15

tend to be small, have height in the hundreds of metes range, and have short eruption cycles.

Answer 15

Cinder cone volcanoes

Question 16

Broad, flat structures composed of layer upon layer of lava flows.

Answer 16

Shield volcanoes

Question 17

large and steep sided often thousands of meters high and tens of kilometers across the base and composed of layers of both lava and ash.

Answer 17

Composite volcanoes

Question 18

what is molten or liquid rocks stored inside earth called?

Answer 18

magma

Question 19

where is the ring of fire located?

Answer 19

Pacific Ocean

Question 20

what forms when tectonic plates collide along subductionn zones?

Answer 20

Volcanoes.

Question 21

which two specific locations can volcanic activity occur due to divergence?

Answer 21

Mid Atlantic Ridge and East African Rift Valley

Question 22

are hotspots stationary?.

Answer 22

yes, they are in a specific place

Question 23

what are created from hot spots?

Answer 23

volcanic islands (Hawaii)

Question 24

if a liquid has a higher viscosity is it going to run faster or slower?

Answer 24

slower

Question 25

if a magma has a higher viscosity does it have more or less silica?

Answer 25

more the higher the viscosity the more silica and the less silica the less viscosity

Question 26

what is pryoclastic material?

Answer 26

the solid material from a volcano

Question 27

what is the smallest pyroclastic material?

Answer 27

ash

Question 28

what are the largest pryoclastic materials?

Answer 28

blocks and bombs

Question 29

what are the types of gases that come from a volcano?

Answer 29

water vapor carbon dioxide and sulfur dioxide

Question 30

how are volcanoes classified?

Answer 30

size shape and material that abrupt.

Question 31

what are the 3 types of volcanoes?

Answer 31

shield, composite, cinder cone volcanoes