Ch 25.3 and 25.4

Question 1

What is the boundary that marks a density change between layers?

Answer 1

Discontinuities

Question 2

how can discontinuities be identified

Answer 2

seismic wavers

Question 3

What are shadow zones

Answer 3

Where no seismic waves are reported

Question 4

What is another name for shadow zones

Answer 4

Dead Zone

Question 5

Between which two degrees to shadow zones fall

Answer 5

105-140 degrees

Question 6

is the outer core solid or liquid

Answer 6

it is a liquid

Question 7

is the inner core a solid or liquid? and why?

Answer 7

Solid because of the pressure

Question 8

What makes up the lithosphere

Answer 8

The crust and the upper most mantle

Question 9

what is the asthenosphere

Answer 9

A plastic like layer that the earth plates move on

Question 10

Which elements make up the mantle

Answer 10

Calcium Aluminum Iron and Magnesium

Question 11

what materials and the cores made of?

Answer 11

Iron and Nickle

Question 12

the measure of fluid’s resistance to flow

Answer 12

viscosity

Question 13

Tend to be small, have heights in the hundreds of meters range, and have short eruption cycles

Answer 13

Cinder cone volcanoes

Question 14

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

Answer 14

Shield volcanoes

Question 15

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

Answer 15

Composite volcanoes

Question 16

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

Answer 16

Silica

Question 17

what is molten or liquid rock stored inside earth?

Answer 17

magma

Question 18

where is the ring of fire located

Answer 18

The pacific ocean

Question 19

What is created when tectonic plates collide along a subduction zone

Answer 19

Volcanoes

Question 20

What are two specific examples of volcanic activity due to divergence

Answer 20

Mid Atlantic ridge

East African Rift

Question 21

Are hot spots stationary

Answer 21

Yes

Question 22

What is created by hot spots

Answer 22

Islands “Hawaii”

Question 23

If a liquid has a higher viscosity will it flow quickly or slowly

Answer 23

Slowly

Question 24

If magma has high viscosity will it contain more or less silica

Answer 24

more

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 are the largest pyroclastic material

Answer 27

Blocks and bombs

Question 28

What are the types of gasses that erupt from volcanoes

Answer 28

Water vapor
Carbon Dioxide
Sulfur Dioxide

Question 29

How are volcanoes classified

Answer 29

Size
Shape
Materials that erupt

Question 30

What are the three types of volcanoes

Answer 30

Cinder cone
Shield
Deposit