Volcanoes and Plate Tectonics

Question 1

Magma’s viscosity depends on…

Answer 1

Amount of silica and temperature

Question 2

Element

Answer 2

A substance that cannot be broken down into other substances

Question 3

Physical

Answer 3

Still has same molecules

Question 4

Chemical:

Answer 4

Different changes, changes what it actually is and can’t change it back

Question 5

The greater the viscosity, the ______ a liquid flows. The _____ the viscosity, the more easily a liquid flows.

Answer 5

Slower, lower

Question 6

Low silica magma forms rocks like ______.

Answer 6

Basalt

Question 7

Pahoehoe

Answer 7

Hot, fast moving lava

Question 8

Aa

Answer 8

Cool slow moving lava

Question 9

Compound

Answer 9

A substance made of two or more elements that have chemically combined

Question 10

Magma forms in the _____________.

Answer 10

Asthenosphere

Question 11

Volcanic ash

Answer 11

Fine rocky particles as small as a speck of dust

Question 12

Cinders

Answer 12

Pebble sized particles

Question 13

Bombs

Answer 13

Particles ranging from the size of a baseball to the size of a car

Question 14

Pyroclastic flow

Answer 14

Occurs when an explosive eruption hurls out a mixture of hot gases, ash, cinders, and bombs

Question 15

Shield volcano

Answer 15

Gently sloping mountain formed by repeated lava flows

Question 16

Lava plateau

Answer 16

High, level area formed by repeated lava flows

Question 17

When volcanic ash breaks down, it releases _________ and __________, both of which are needed by plants

Answer 17

Potassium, phosphorus

Question 18

Batholiths

Answer 18

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

Question 19

Geyser

Answer 19

A fountain of water and steam that erupts from the ground

Question 20

Hot springs

Answer 20

When ground water heated by a nearby body of magma rises to the surface and collects in a natural pool