Chapter 25.3 25.4

Question 1

What is the Boundary that marks the density change between layers?

Answer 1

Discontinuity

Question 2

How are discontinuity identify?

Answer 2

identified by using seismic waves

Question 3

What are shadow zones?

Answer 3

P-waves and S-waves

areas where no seismic waves are recorded

Question 4

What is another name for shadow zones?

Answer 4

Dead Zone

Question 5

Between what degrees do shadow zones fall?

Answer 5

105 to 140 degrees

Question 6

Is the outer core a sold or liquid?

Answer 6

Liquid

Question 7

Is the inner core a solid or a liquid?

Answer 7

Solid because of so much pressure

Question 8

What makes up the lithosphere?

Answer 8

Crust and Uppermost mantle

Question 9

What is the asthenosphere?

Answer 9

A plastic like layer which earths points move

Question 10

What element make of the mantle?

Answer 10

calcium

aluminum

Question 11

Which elements make up the

Answer 11

Iron

Nickle

Question 12

measure of a fluids resistance to flow

Answer 12

viscosity

Question 13

chemical compound silicon dioxide SiO2 common ingredient in most magma

Answer 13

silica

Question 14

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

Answer 14

cinder cone volcano

Question 15

are broad flat structures composed of layer upon layer of lava flows

Answer 15

shield volcano

Question 16

are 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 16

composite volcano

Question 17

what is molten or liquid rock stored inside the earth called?

Answer 17

Magma

Question 18

Where is the ring of fire located?

Answer 18

Pacific

Question 19

what are two specific locations where volcanic activity occurs do to divergent?

Answer 19

east African Rift Valley

Mid Atlantic Ridge

Question 20

Are hot spots stationary?

Answer 20

yes they are

Question 21

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

Answer 21

More

Question 22

What is Pyroclastic material?

Answer 22

Any solid material 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

volcanic blocks and bombs

Question 25

What are the types of gases that erupt from a volcano?

Answer 25

water vapor
carbon dioxide
sulfur dioxide

Question 26

How are volcanoes classified?

Answer 26

size shape and materials that erupt

Question 27

what are the three types of volcaonoes?

Answer 27

cinder cone

composite