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Flashcards in Ch 6 Vocab Deck (21):
0

A mountain that forms in earths crust

Volcano

1

A mixture of rock forming substances gases and water from the mantle

Magma

2

When magma reaches the surface it is called

Lava

3

A major belt of volcanoes around the Pacific Ocean

Ring of fire

4

Resulting volcanoes sometime create a string of islands called

Island arc

5

An area where material from deep within earths mantle rises through the crust and melts to form magma

Hot spot

6

Beneath a volcano magma collects in a

Magma chamber

7

A long tube that extends from earths crust up through the too of the volcano connecting the magma chamber to earths surface

Pipe

8

Molten rock and gas leave the volcano through an opening called a

Vent

9

The spread of lava as it pours out of a vent

Lava flow

10

A bowl shaped area that may form at the top of a volcano around the central vent

Crater

11

A material found in magma that forms from the elements oxygen and silicon

Silica

12

A mixture of hot gases ash cinders and bombs that flow down the sides of a volcano when it erupts explosively

Pyro clastic flow

13

The hole left when a volcano collapse

Caldera

14

Cone shaped hill or small mountain

Cinder cone

15

Tall cone shaped mountains in which layers of lava alternate with layers of ash

Composite volcano

16

Such lava flows slowly build a wide gently sloping mountain called

Sheiks volcano

17

Forms when magma hardens in a volcanos pipe and the surrounding rock later wears away

Volcanic neck

18

Magma that forces itself across layers and hardens into a

Dike

19

Magma that squeezes between horizontal rock layers hardens to form

Sill

20

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

Batholith