Volcanoes Quest

Question 1

Magma

Answer 1

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

Question 2

Lava

Answer 2

When magma reaches the surface

Question 3

Ring of Fire

Answer 3

Major volcanic belt

Question 4

Volcanic Belts

Answer 4

Form along the boundaries of Earth’s plates

Question 5

How does magma reach the surface?

Answer 5

At plate boundaries, huge pieces of the earth’s crust diverge (pull apart) or converge (push together). As a result, the crust fractures, letting magma reach the surface

Question 6

Volcano

Answer 6

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

Question 7

Where do volcanoes form?

Answer 7

Along diverging plate boundaries such as mid ocean ridges,nor along converging plate boundaries where subduction takes place

Question 8

What happens along a Rift Valley?

Answer 8

Lava pours out of cracks in the ocean floor, gradually building new mountains

Question 9

Pahoehoe

Answer 9

Thin, runny, has less silica

Question 10

Aa

Answer 10

Thick, doesn’t go very far, more silica, more viscous

Question 11

Physical property

Answer 11

Any chracteristic of a substance that can be observed or measured without changing the composition of the substance

Question 12

Chemical property

Answer 12

Any property that produces change in the composition of matter

Question 13

Compound

Answer 13

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

Question 14

Element

Answer 14

A substance that cannot be broken down into other substances

Question 15

Viscosity

Answer 15

The resistance of liquid to flowing

Question 16

Silica

Answer 16

A compound made up of particles of the elements oxygen and silicon

Question 17

Magma chamber

Answer 17

Magma collects in a pocket

Question 18

Pipe

Answer 18

A long tube that connects that magma chamber to earth’s surface