Unit 4 Lesson 4

Question 1

Volcano

Answer 1

Any place where gas, ash, or melted rock come out of the ground

Question 2

Magma

Lava

Answer 2

Melted rock

Magma that has reached earths surface

Question 3

Vent

Answer 3

The opening of a volcano

Question 4

Pyroclastic Material

Answer 4

Hot ash and bits of rock that is ejected into the atmosphere

Question 5

Types of volcanoes

Answer 5

Shield volcanoes - have a broad base and gently sloping sides. Mild eruptions
Cinder cone volcanoes- form when ash and larva harden in the air and build up around a vent. Steep
Composite volcanoes- formed from alternating layers of larva flow and pyroclastic material. Steep mountains

Question 6

Volcanic crater

Magma chamber

Answer 6

An opening at the top of a volcano caused by eruptions

An expanded area of magma

Question 7

Caldera

Answer 7

Basin- shaped depression formed from the emptying of a magma chamber

Question 8

Tectonic Plates

Answer 8

Giant sections of the lithosphere on Earth’s surface

Question 9

Hot Spot

Answer 9

A location where a column of extremely hot mantle rock ( mantle plume)rises through the asthenosphere

Question 10

Fissure

Answer 10

a structure formed at divergent boundaries. The plates split, allowing hot magma to rise up from the mantle. After enough time has passed, the mag,a cools and forms new crust.