Chap 9.3 Flashcards
1
Q
Igneous rocks
A
Rocks that form from lava or magma
2
Q
Extrusive rocks
A
Igneous rock that forms from lava above the earths surface
3
Q
Pumice
A
pale rock that forms when frothy lava cools in the air.
4
Q
Scoria
A
rock that contains the same minerals as granite.
5
Q
Abrasive
A
a property of a material or substance that easily scratches another
6
Q
Basalt
A
a dark, igneous rock with small crystals formed by fast cooling of hot lava.
7
Q
Obsidian
A
a black, glassy rock that breaks into pieces with smooth shell-like surfaces
8
Q
Intrusive rock
A
igneous rock that forms when magma cools below the Earth’s surface
