25.3 and 25.4

Question 1

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

Answer 1

discontinuity

Question 2

How are discontinuities identified?

Answer 2

by using seismic waves

Question 3

What are shadow zones?

Answer 3

areas where seismic waves aren’t recorded

Question 4

What is another name for shadow zone?

Answer 4

Dead zone

Question 5

At which degree range do shadow zones fall?

Answer 5

105 degrees to 140 degrees

Question 6

Is the outer core a liquid or a solid?

Answer 6

Liquid

Question 7

Is the inner core a liquid or a solid? why?

Answer 7

solid because of the pressure

Question 8

What makes up the lithosphere?

Answer 8

Crust and the uppermost mantle

Question 9

What is the the asthenosphere?

Answer 9

plastic-like layer which Earths plates move

Question 10

Which elements make up the mantle?

Answer 10

Calcium, Aluminum, Iron, and Magnesium

Question 11

Which elements make up the core?

Answer 11

Iron and Nickel

Question 12

What is the measure of a fluids resistance to flow?

Answer 12

Viscosity

Question 13

What is the chemical compound silicon dioxide that is also a common ingredient in most magma ?

Answer 13

Silica

Question 14

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

Answer 14

Cinder Cone Volcanoes

Question 15

What volcanoes are broad, flat structures composed of layer upon layer of lava flows?

Answer 15

Shield Volcanoes

Question 16

What volcanoes 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 Volcanoes

Question 17

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

Answer 17

Magma

Question 18

Where is the ring of fire located?

Answer 18

along the Pacific Ocean shore line

Question 19

Which two specific locations have volcanic activity do to divergence?

Answer 19

Mid Atlantic Ridge and East African Rift Valley

Question 20

Are hot spots stationary?

Answer 20

yes!

Question 21

What can hot spots create?

Answer 21

Islands {Hawaiian island}

Question 22

What are the gases that come from volcanoes?

Answer 22

water vapor, carbon dioxide, sulfur dioxide

Question 23

How are volcanoes classified?

Answer 23

size, shape, and the materials that erupt from it

Question 24

What are the 3 types of volcanoes?

Answer 24

Cinder Cone
Shield and
Composite Volcanoes

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

Volcanic ash

Question 27

What is the largest pyroclastic material?

Answer 27

Volcanic blocks and bombs