Chapter 25

Question 1

discontinuity

Question 2

sismic waves

Question 3

areas where no sismic waves are recorded

Question 4

deadzone

Question 5

between what degreas do shadow zones fall

Question 6

liquid

Question 7

solid because the pressure

Question 8

made up of crust and uppermost manttel\
the asthenosphere
 a plastic like layer with earths plates move
calciam aluminum magnisiam
iron and nickle

Question 9

is the measure of fluid resistance to flow

Answer 9

viscocity

Question 10

chemical compound silicon dioxide,SIO2p which is commen ingredient

Answer 10

silica

Question 11

tend to be small have heighs in hundred meter range and have short erupyion cycles

Answer 11

cinder come volcanoes

Question 12

Are broad flat structured composed of layer upon layer of lava flows.

Answer 12

shield volcanoes

Question 13

are large steep sided often thousends of meters and tens of kilometers across the base and composed layer of both lava and ash

Answer 13

composite volcanoes

Question 14

where the ring of fire located

Answer 14

pacific ocaen

Question 15

what is the moten or liquid stored called

Answer 15

magma

Question 16

what are 2 spacific locations where voncanic activity ocurrs due to divergence

Answer 16

east african rift

mid atlantic ridge

Question 17

are hot spots stationary

Answer 17

,yes they are

Question 18

if magma has a high viscosity will it obtain more or less silica

Answer 18

more it will flow more quick

Question 19

what is pyro

Answer 19

any solid materil that comes from a volcano

Question 20

what is the smallest pyroclastic material

Answer 20

volcanic ash

volcanic blocks and ash

Question 21

what are the types of gas that erupts in a volcano

Answer 21

water vapor
carbon dioxide
sulfer dioxide