Chapter 25.3 and 25.4

Question 1

What is the boundary that marks density change between layers?

Answer 1

Discontinuity

Question 2

How can discontinuities be identified?

Answer 2

Seismic waves

Question 3

What are Shadow Zones?

Answer 3

The areas where no seismic waves are recorded

Question 4

What is another term for Shadow Zone?

Answer 4

Dead Zone

Question 5

Between which two degrees do shadow zones fall in?

Answer 5

105 and 140 degrees

Question 6

Is the outer core a solid or a liquid?

Answer 6

Liquid

Question 7

Is the inner core a solid or liquid ? Why?

Answer 7

The inner core is solid because of the pressure

Question 8

What makes up the lithosphere ?

Answer 8

The crust and the uppermost mantle

Question 9

What is the asthenosphere?

Answer 9

A weak, plastic like layer which earth’s plates move on

Question 10

Which elements make up the mantle?

Answer 10

Calcium, aluminum, iron, and Magnesium

Question 11

What 2 elements make up the core?

Answer 11

iron and nickel

Question 12

is the measure of fluid’s resistance to flow

Answer 12

Viscosity

Question 13

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

Answer 13

Silica

Question 14

Is small, have heights in the hundreds of meters range, and have short eruption cycles

Answer 14

Cinder cone volcanoes

Question 15

A broad, flat structures composed layer upon layer of lava flows

Answer 15

Shield volcanoes

Question 16

A large and steep-sided , often thousands of meters high and tens of kilometers across the base, composed of lava and ash

Answer 16

Composite Volcanoes

Question 17

What is molten , or liquid, rocks stored inside Earth is called?

Answer 17

Magma

Question 18

Where is the ring of fire located?

Answer 18

The Pacific Ocean

Question 19

What are two specific example of volcanic activity due to divergents?

Answer 19

East African Rift Valley

MId Atlantic RIdge

Question 20

Are hot spots stationary ?

Answer 20

Yes hot stops are stationary only the plate above moves

Question 21

What is created from hot spots?

Answer 21

Islands

Question 22

If it liquid has a high viscosity will it flow more quickly or more slowly?

Answer 22

It will flow more slowly

Question 23

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

Answer 23

It will contain more silica

Question 24

What is Pyroclastic Material?

Answer 24

any solid material that erupts from a volcano

Question 25

What is the smallest type of Pyroclastic Material?

Answer 25

Volcanic Ash

Question 26

What is the largest type of Pyroclastic material ?

Answer 26

Volcanic Blocks

Question 27

What are the types of gasses that erupt from volcanoes ?

Answer 27

Water vapor, Carbon dioxide, and Sulfur dioxide

Question 28

How are volcanoes classified ?

Answer 28

Size, shape , and the materials that erupt

Question 29

What are the three types of volcanoes?

Answer 29

CInder cone volcanoes
Shield volcanoes
Composite volcanoes