Ch 25.3- 25.4

Question 1

What is the boundary that markes density change between layers

Answer 1

Discontinuity

Question 2

How are discontinuitys idenitfide?

Answer 2

By using seismic waves

Question 3

What are shadow zones?

Answer 3

Areas where seismic waves are not recorded

Question 4

What is another name for shadow zone

Answer 4

Dead zone

Question 5

Where are the degreas where the showed zone fall?

Answer 5

105-140

Question 6

Is the outter core a liquid or a solid?

Answer 6

liquid

Question 7

Is the inner cord a liqid or solid, why?

Answer 7

solid because the presher

Question 8

What makes up the lthosphere

Answer 8

crust and the uppermost mantal

Question 9

What is the asthenosphere?

Answer 9

plastic light lary witch earch’s plates move on

Question 10

Whitch elements make up the manytle?

Answer 10

calcium, alumminum, iron, magnesium

Question 11

Whitch elements make up the core?

Answer 11

iron, nick

Question 12

Viscosity

Answer 12

measure of a fluid’s resistance to flow

Question 13

silica

Answer 13

the chemical compound siliscon dioxide SiO2 a common ingredient in most magama

Question 14

cinder cone volcanoes

Answer 14

small, has hights in hunderds of meters range and have short eruption cycles

Question 15

sheid volcanoes

Answer 15

borad flat structures composed of layer of lava flows

Question 16

composite volcanoes

Answer 16

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

Question 17

what two locations have active volcanoes due to divergents

Answer 17

mid-atlantic rige and the east african rift

Question 18

Do hot spots stay put?

Answer 18

yes

Question 19

what can hot pots create

Answer 19

ilands )(hawaii)

Question 20

the higher the viscosity if th viscocity high will the fluwed flow fast or slow?

Answer 20

slow

Question 21

if magma has a high viscosity will it contan more or less viscositie

Answer 21

more

Question 22

what is pyroclastic material?

Answer 22

any sold material from a volcanoe

Question 23

what is the smallest pyroclastic material

Answer 23

ash

Question 24

what is the largest type of pyroclastic

Answer 24

volcanoc blocks and boms

Question 25

what are types of gasses volcanoes erupt?

Answer 25

water vapor, carbon dioxide, sulfor dioxide

Question 26

what are the eruptive styles?

Answer 26

depends on magma composition and velocity

Question 27

how are volcanoes classified

Answer 27

size, shape, materials that erupt

Question 28

what do cinder cone erupt?

Answer 28

high-tempersture, gas-rich, basaltic lava

Question 29

how are shiled volcanoes formed?

Answer 29

low viscosity, basaltic