9.3 Flashcards
1
Q
rocks that form from the cooling of lava or magma
A
igeneous rocks
2
Q
igneous rock that forms when lava cools above the Earth’s surface
A
extrusive
3
Q
a pale rock that forms when frothy lava cools in the air
A
pumice
4
Q
a dark, igneous rock formed from gassy lava that cools quickly
A
scoria
5
Q
a property of a material or substance that easily scratches another
A
abrasive
6
Q
a dark, igneous rock with small crystals formed by fast cooling of hot lava
A
basalt
7
Q
a black, glassy rock that breaks into pieces with smooth shell-like surfaces
A
obsidian
