Lesson 13

Question 1

Not fluid or semifluid material below or within the earth’s crust from which other igneous rocks is formed on cooling

Answer 1

Magma

Question 2

Is a molten rock generated by geothermal energy and expelled through fractures in planetary crust or in an eruption, usually at temperatures from 700 to 1200 degrees celsius

Answer 2

Lava

Question 3

A moving fluid mass composed of volcanic debris and water

Answer 3

Lahar

Question 4

Mixture of gas and rock fragments most if which are ash-sized particles, ejected violently from a crater or fissure

Answer 4

Ash Fall