Science 6Th Vocabulary Words!!

Front 1

Volcano

Back 1

is a weak spot in the crust where molten material, or magma, comes to the surface

Front 2

Magma

Back 2

is a molten mixture of rock-forming substances, gases, and water from the mantle

Front 3

Lava

Back 3

when magma reaches the surface

Front 4

Ring of Fire

Back 4

One major volcanic belt from by many volcanoes that rim the pacific ocean

Front 5

Island Arc

Back 5

resulting volcanoes create a string of islands

Front 6

Hot spot

Back 6

is an area where magma from the deep within the mantle melts through the crust like a blow torch

Front 7

Magma chamber

Back 7

a pocket beneath a volcano where the magma collects

Front 8

Pipe

Back 8

a long tube in the ground that connects the magma chamber to Earth's surface

Front 9

Lava flow

Back 9

is the area covered by lava as it pours out of a vent

Front 10

Crater

Back 10

is a bowl-shaped area that may form at the top of a volcano around the volcanoes central vent

Front 11

Silica

Back 11

a material that is formed from the elements oxygen and silicon, is one of the most abundant materials on Earth's crust, and mantle

Front 12

Pahoehoe

Back 12

is fast-moving, hot lava

Front 13

aa

Back 13

is slow moving, cool lava

Front 14

Pyroclostic flow

Back 14

occurs when an explosive eruption hurls out ash, cinders, and bombs as well as gases

Front 15

Active

Back 15

live, volcano is one that erupts continuously

Front 16

Dormant

Back 16

sleeping, volcano is like a sleeping bear

Front 17

Extinct

Back 17

dead, volcano unlikely to erupt again

Front 18

Hot spring

Back 18

forms when underground water heated by a nearby body of magma rises to the surface and collects in a natural pool

Front 19

Geothermal energy

Back 19

water heated by magma can provide a clean, reliable energy source

Front 20

Geyser

Back 20

is a fountain of water and steam that erupts from the ground

Front 21

Shield volcano

Back 21

Such lava flows gradually build a wide, gently sloping mountain

Front 22

Cinder-cone volcano

Back 22

a steep, cone-shaped hill or mountain

Front 23

Composite volcano

Back 23

tall, cone-shaped mountains in which layers of lava alternate with layers of ash

Front 24

Caldera

Back 24

A huge hole left by the collapse of a volcanic mountain

Front 25

Volcanic neck

Back 25

forms when magma hardens in a volcano's pipe

Front 26

Dike

Back 26

Magma that forces itself across rock layers hardens

Front 27

Sill

Back 27

when magma squeezes between layers of rock

Front 28

Batholith

Back 28

is a mass of rock formed when large body of magma cools inside the crust