2.2 igneous rock

Question 1

rock formed from the cooling and solidification of magma beneath the earth’s surface

Answer 1

intrusive igneous rock

Question 2

rock that forms as a result of volcanic activity at or near the Earth’s surface

Answer 2

extrusive igneous rock

Question 3

hot, liquid rock

Answer 3

magma

Question 4

light-colored rocks rich in elements such as aluminum, potassium, silicon, and sodium

Answer 4

felsic

Question 5

dark-colored rocks rich in calcium, iron, and magnesium

Answer 5

mafic

Question 6

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

Answer 6

volcanic neck

Question 7

a sheetlike body of intrusive rock that cuts across other rock layers

Answer 7

dike

Question 8

a sheetlike body of intrusive rock that is parallel to other rock layers

Answer 8

sill

Question 9

the largest kind of intrusive rock body

Answer 9

batholith

Question 10

a large body of intrusive rock

Answer 10

stock

Question 11

magma that reaches the Earth’s surface

Answer 11

lava

Question 12

when lava erupts from a volcano

Answer 12

lava flow

Question 13

long cracks in the Earth’s crust that lava flows through

Answer 13

fissure

Question 14

when lava covers a large area and forms a plain

Answer 14

lava plateau