Science Volcanoes Test

Front 1

volcano

Back 1

a volcano is a weak spot in the crust where molten material comes to the surface

Front 2

magma

Back 2

molten rock

Front 3

lava

Back 3

molten rock once it reaches the surface

Front 4

Ring of Fire

Back 4

A ring of volcanoes around the pacific plate.

Front 5

Where do volcanoes form?

Back 5

around diverging plate boundaries and converging plate boundaries

Front 6

How are island arches formed?

Back 6

When two plates converge, the denser plate sinks under the less dense one, and some of the crust there melts and becomes magma, which rises, breaks through a weak spot, and forms volcanoes or volcanic islands as it moves along.

Front 7

hot spot

Back 7

an area deep within the mantle that rises and then melts, forming magma

Front 8

physical property

Back 8

any characteristic of a substance that can be observed or measured without changing the composition of the substance

Front 9

chemical property

Back 9

any property that produces a change in the composition of matter

Front 10

viscosity

Back 10

the resistance of a liquid to movement

Front 11

2 parts that effect magma's viscosity

Back 11

the more silica, and hotter it is, the higher the viscosity

Front 12

Aa

Back 12

a slow moving cool lava witch is jagged when cooled

Front 13

Pahoehoe

Back 13

a fast moving hot lava that is smooth an wrinkly when cooled