Hot Rocks

Question 1

Igneous rocks

Answer 1

Rocks that form from the cooling of lava or magma as it is thrown through the air from a volcanic eruption

Question 2

Extrusive rocks

Answer 2

Igneous rock that forms when lava cools above the Earth’s surface

Question 3

Pumice

Answer 3

A pale rock that forms when frothy lava cools in the air

Question 4

Scoria

Answer 4

A dark, igneous rock formed from gassy lava that cools quickly

Question 5

Abrasive

Answer 5

A property of a material or substance that easily scratches another

Question 6

Basalt

Answer 6

A dark, igneous rock with small crystals formed by fast cooling of hot lava. It sometimes has holes that once contained volcanic gases

Question 7

Obsidian

Answer 7

A black, glassy rock that breaks into pieces with smooth shell-like surfaces

Question 8

Intrusive rocks

Answer 8

Igneous rock that forms when magma cools below the Earth’s surface

Question 9

Batholiths

Answer 9

Intrusive rock mass that measures more than 100 kilometres across

Question 10

Granite

Answer 10

A hard, igneous rock with different-coloured crystals large enough to see. It forms slowly below the Earth’s surface.