Chapter 9.3- 'Hot' rocks Flashcards
1
Q
Igneous rocks
A
Formed from molten magma. The material is made liquid by the heat inside the Earths mantle
2
Q
Extrusive rocks
A
Igneous rocks that crystallize on the earth’s surface
3
Q
Pumice
A
Rocks that forms when frothy lava cools in the air.
4
Q
Scoria
A
Igneous rock formed from gassy lava that cools quickly
5
Q
Abrasive
A
A property of a material or substance that easily scratches another
6
Q
Basalt
A
Dark igneous rock with small crystals formed by fast cooling of lava.
7
Q
Obsidian
A
a volcanic glass similar in composition to granite, usually dark but transparent in thin pieces, and having a good conchoidal fracture.
