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 rock made from rich elements such as aluminum, potassium, silicon, and sodium

Answer 4

Felsic Rock

Question 5

Dark-colored rocks rich in calcium, iron, and magnesium, but poor in silicon

Answer 5

Mafic Rock

Question 6

Sheetlike intrusions that CUT ACROSS previous rock formations

Answer 6

Dike

Question 7

Sheetlike intrusions that are oriented PARALLEL to previous rock units

Answer 7

Sills

Question 8

The largest of all igneous rock intrusions

Answer 8

Batholiths

Question 9

Intrusive bodies that are exposed over smaller areas than batholiths

Answer 9

Stocks

Question 10

When lava erupts from a volcano

Answer 10

Lava Flow

Question 11

Long cracks in the Earth’s surface

Answer 11

Fissures

Question 12

Large amounts of lava flows from fissures on to land, lava covers a large area and forms a small plain which is called a _______

Answer 12

Lava Plateau

Question 13

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

Answer 13

Volcanic Neck

Question 14

Magma that reaches the Earth’s surface

Answer 14

Lava