volcanos and earthquakes

Question 1

Ring of fire

Answer 1

is a region around much of the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur. T

Question 2

Strike-slip Fault

Answer 2

is concerned with the structures formed by, and the tectonic processes associated with

Question 3

Normal fault

Answer 3

a dip-slip fault in which the block above the fault has moved downward relative to the block below.

Question 4

Reverse Fault

Answer 4

is the opposite of a normal fault—the hanging wall moves up relative to the footwall. Reverse faults indicate compressive shortening of the crust

Question 5

P-wave

Answer 5

A seismic wave that caues patricles of rock to move in a back-and-fourth direction

Question 6

S-wave

Answer 6

A seismic wave that causes particles of rock to move in a side-to-side direction

Question 7

Epicenter

Answer 7

The point on Earth’s surface directly above an earthquake’s starting point, or focous

Question 8

Focus

Answer 8

a focus, also called an image point, is the point where light rays originating from a point on the object converge.

Question 9

Richter magnitude scale

Answer 9

is a measure of the strength of earthquakes,

Question 10

explosive volcano

Answer 10

an explosive eruption is a volcanic eruption of the most violent type.

Question 11

nonexplosive volcano

Answer 11

are the most common type of volcanic eruptions. These eruptions produce relatively calm flows of lava in huge amounts.

Question 12

krakatoa

Answer 12

is a small volcanic island in Indonesia, located about 100 miles west of Jakarta. In August 1883, the eruption of the main island of Krakatoa

Question 13

Yellowstone supervolcano

Answer 13

is one of the largest known volcanoes in the world and the largest volcanic system in North America.

Question 14

San Andreas fault

Answer 14

is a continental transform fault that extends roughly 1,200 kilometers through California.

Question 15

Mid-oceanic

Answer 15

is an underwater mountain range, formed by plate tectonics.

Question 16

shield volcano

Answer 16

is a type of volcano usually composed almost entirely of fluid lava flows.

Question 17

cinder cone volcano

Answer 17

is a type of volcano usually composed almost entirely of fluid lava flows.

Question 18

composite volcano

Answer 18

are cone-shaped volcanoes built from many layers of lava, pumice, ash, and tephra.

Question 19

hot spot

Answer 19

is an area on Earth over a mantle plume or an area under the rocky outer layer of Earth, called the crust, where magma is hotter than surrounding magma.

Question 20

Mt. Vesuvius

Answer 20

active volcano that rises above the Bay of Naples on the plain of Campania in southern Italy. Its western base rests almost upon the bay.