Lesson 6.1

Question 1

a vent or fissure in the Earth’s surface though which magma and gases are expelled

Answer 1

volcano

Question 2

the body of molten rock that feeds a volcano

Answer 2

magma chamber

Question 3

an opening at the surface of the Earth through which volcanic material passes

Answer 3

vent

Question 4

molten rock beneath the Earth’s surface

Answer 4

magma

Question 5

magma that flow out onto the Earth’s surface

Answer 5

Lava

Question 6

dust-sized particles of magma that harden in the air

Answer 6

ash

Question 7

lava’s solid form

Answer 7

pumice

Question 8

magma that is blasted into the air and hardens

Answer 8

Pyroclastic Material

Question 9

cool, stiff lava that forms jumbled heaps of sharp-edged chunks

Answer 9

Blocky Lava

Question 10

slow-flowing lava whose glassy surface has rounded wrinkles

Answer 10

Pahoehoe Lava

Question 11

lava that pours out quickly and forms a brittle crust, then is torn into jagged pieces as molten lava continues to flow underneath

Answer 11

Aa Lava

Question 12

lava that erupts underwater and forms rounded lumps

Answer 12

Pillow Lava

Question 13

enormous amounts of hot ash, dust, and gasses that are ejected from a volcano

Answer 13

Pyroclastic flow

Question 14

the thickness of lava

Answer 14

viscosity