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Flashcards in Volcanoes Deck (16):
1

What kind of volcano is this?

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Composite or stratovolcano

 

Very tall with steep sides

2

What kind of volcano is this?

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Cinder cone

 

Steep sides and short

3

What kind of volcano is this?

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Shield

 

Wide and very tall

4

Magma

Liquid rock beneath the surface of the Earth

5

Lava

Liquid rock on the surface of the Earth

6

Vent

Opening that lava comes out of

7

Cinder

Small blob of lava ejected from a volcano

8

Bomb

Large blob of lava ejected from a volcano

9

Ash

Sand-like particle ejected from a violent eruption.

 

Falls like snow crushing roofs

10

Dust

Fine volcanic ash from violent eruptions.

 

Can enter the atmosphere and block out some of the Sun's energy, reducing temperatures and the rate of photosynthesis

11

Silica

Ingredient in magma that makes it thicker

 

Higher % of silica = thick lava = violoent eruptions

12

Water

Ingredient in magma found as steam.  Steam can lead to higher pressure in the volcano and violent eruptions.

13

High temperatures

High temperature lava flows quickly and leads to quiet eruptions.

Low temperature lava flows poorly and leads to violent eruptions.

14

Glacier on a volcano

Glaciers melt prior to eruptions causing deadly mudflows

15

Wind and volcanos

Ash can be blown by wind to far off areas putting them in jeopardy

16

Pyroclastic Flow

An avalanche of thick, high silica lava down the side of a volcano

Buried the city of Pompeii