ch.23 Flashcards

(29 cards)

1
Q

what is the boundary that marks the density change

A

discontinuity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

how can discontinuity be identified

A

by using sic mic waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is a shadow zone?

A

where no size mic waves have been reported

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is another name for shadow zones

A

dead zone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what are the degree from an eppasenter that shadow zones fall???

A

105 and 140 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what can p-waves and s-waves travel through

A

p-waves can go through a solid and a liquid

s-waves can go through a solid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

is the outer core a solid or a liquid

A

the outer core is a liqud

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

is the inner core a sold or a liquid

A

it is a solid do to the presser

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is a lit ho spear

A

the crust and the upper most mantel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is the asthenosphere

A

its a plastic like layer that the plates move on

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what mat italic mate riles make up the core

A

iron and nickle make up the core

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what elements make up the mantel

A

calcium, aluminum, iron,magnesium.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

viscosity

A

is the measure of fluids rest-ant to flow .

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

silica

A

is the chemical compound silicon dioxide , SiO 2 , which is a common ingredient in the magma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

cinder cone volcanoes

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

shield volcanoes

A

are broad, flat structures composed of layer of lava flows

17
Q

composite volcanoes

A

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.

18
Q

what is molten or liquid rocks stored in the earth

19
Q

where is the ring of fire located

A

the ring or fire is located in the pacific ocean

20
Q

what forms do tectonic plates collied substitution zones

21
Q

which two locations can volcanic activity happen due to divergents

A

the mid-Atlantic ridge

and the east African ridge

22
Q

are hot spots stationary/ do they move

A

no they are in a set location/ they are stuck in a spot

23
Q

what are created from hot spots

A

volcanic islands/ Hawaii

24
Q

if a liquid has a high viscosity will it run faster or slower

A

it will run slower

25
if a magma has a high viscosity dose it have more or less silica
it contains more silica
26
what is pyroclastic materiel
ash
27
what are the largest Pyroclastic material what are the types of gases that come from a volcano
blocks and bombs water vapor,carbon dioxide and sulfur dioxide
28
how are volcanoes classified
there size shape and the materials they erupt
29
what are the three types of volcanoes
cinder cones ,shield,composite volcano