2.2 Igneous Rock

Question 1

Rock formed from cooling and solidification of magma beneath the Earths’s surface

Answer 1

intrusive igneous rock

Question 2

Rock that forms as a result of volcanic activity at or near the Eart’s surface

Answer 2

extrusive igneous rock

Question 3

Th layer of rock between Earth’s crust and the core.

Answer 3

magma

Question 4

Light colored rocks that are rich in elements such as aluminum, potassium, silicon, and sodium

Answer 4

felsic rock

Question 5

Dark colored rocks that are rich in calcium, iron, magnesium and poor in silicon.

Answer 5

mafic rock

Question 6

Sheetlike intrusions that cut across previous rock units

Answer 6

dike

Question 7

Sheetlike intrusions that are oriented parallel to previous rock units

Answer 7

sill

Question 8

The largest of all igneous intrusions

Answer 8

batholith

Question 9

Intrusive bodies that are exposed over smaller areas than batholiths

Answer 9

stock

Question 10

hot molten rock erupted from a volcano or fissure

Answer 10

lava

Question 11

a mass of flowing or solidified lava

Answer 11

lavaflow

Question 12

a long, narrow opening from which lava flows

Answer 12

fissure

Question 13

When a large amount of lava flows out onto land, the lava can cover a large area and form a plain called a lava plateau

Answer 13

lava plateau

Question 14

A volcanic neck forms when a dike or a stock is exposed to the surface. The rock around it erodes away and only the igneous rock is left behind.

Answer 14

volcanic neck