6.1

Question 1

Molten rock.

Answer 1

Magma

Question 2

Magma that flows onto Earth’s surface.

Answer 2

Lava

Question 3

Areas of Earth’s surface through which magma and volcanic gases pass.

Answer 3

Volcano

Question 4

Dust-sized particles from a volcano.

Answer 4

Ash

Question 5

A body of molten rock deep underground that feeds a volcano.

Answer 5

Magma Chamber

Question 6

Cracks in the Earth’s crust.

Answer 6

Vents

Question 7

Rock that can float in water.

Answer 7

Pumice

Question 8

Forms when magma is blasted into the air and hardens.

Answer 8

Pyroclastic Material

Question 9

Cool, stiff lava that oozes from a volcano and forms jumbled heaps of sharp-edged chunks.

Answer 9

Blocky Lava

Question 10

Lava that forms underwater in rounded lumps.

Answer 10

Pillow Lava

Question 11

Lava that flows slowly and has a glassy surface and rounded wrinkles.

Answer 11

Pahoehoe Lava

Question 12

Lava that pours out quickly and forms a brittle crust.

Answer 12

Aa Lava

Question 13

Large blobs of magma that harden in the air.

Answer 13

Volcanic Bombs

Question 14

Pebblelike bits of magma that harden before they hit the ground.

Answer 14

Lapilli

Question 15

Tiny, glasslike slivers.

Answer 15

Volcanic Ash

Question 16

Pieces of solid rock erupted from a volcano.

Answer 16

Volcanic Blocks

Question 17

A dangerous type of volcanic flow.

Answer 17

Pyroclastic Material

Question 18

The thickness of lava.

Answer 18

Viscosity