chapter 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 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 solid or a liquid?

Answer 6

Liquid

Question 7

Is the Inter core a solid or a liquid and why?

Answer 7

Solid, because of so much pressure.

Question 8

What makes up the lithosphere?

Answer 8

Made up of crust and uppermost mantle

Question 9

What is asthenosphere?

Answer 9

A plastic like layer, which earth’s plates move.

Question 10

Which elements make up the mantle?

Answer 10

Calcium,aluminum,

Question 11

Which elements make up the core?

Answer 11

Iron and magnesium

Question 12

the measure of fluids resistance to flow

Answer 12

Viscosity

Question 13

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

Answer 13

Silica

Question 14

tend to be small, have heights in the hundredths of meters range, and have short eruption cycles.

Answer 14

Cinder cone volcanoes

Question 15

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

Answer 15

Shield volcanoes

Question 16

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

Answer 16

Composite Volcanoes

Question 17

What is the smallest pyroclastic material

Answer 17

Volcanic ash

Question 18

Forms when molten rock rises from deep within Earth and erupts from a crack in the crust

Answer 18

Volcano

Question 19

Occurs where plates separates along a mid-ocean ridge or where plates collide along a subduction zone

Answer 19

Volcanic Eruptions

Question 20

a feature that forms when magma reaches Earth’s surface and erupts as either lava or ash.

Answer 20

Volcano

Question 21

occurs along divergent plate boundary

Answer 21

Volcanic activity

Question 22

What is the largest pyroclastic materials

Answer 22

Volcanic blocks and bombs

Question 23

erupts in a variety of ways depending on magma composition and velocity

Answer 23

Volcano

Question 24

classified according to their size, shape, and the materials that erupt.

Answer 24

volcanoes

Question 25

What is molten or liquid rock stored inside earth called

Answer 25

magma

Question 26

Where is the ring of fire located

Answer 26

Pacific Ocean

Question 27

What are 2 specific locations where volcanic activity occurs do to divergents?

Answer 27

East Africa Rift Valley and Mid-Atlantic Ridge

Question 28

Are hot spots stationary

Answer 28

yes

Question 29

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

Answer 29

more

Question 30

What is pyroclastic material

Answer 30

Any solid material that erupts from a volcano

Question 31

What is the smallest pyroclastic material

Answer 31

volcanic ash

Question 32

What is the largest pyroclastic material

Answer 32

volcanic blocks and bombs

Question 33

What are the types of gases that erupt from a volcano

Answer 33

water vapor, carbon dioxide, and sulfer dioxide

Question 34

How are volcanoes classified

Answer 34

their size, shape, and the materials that erupt

Question 35

What are the 3 types of volcanoes

Answer 35

cinder cone, shield, and composite