9.2 Flashcards
1
Q
Igneous rocks
A
Igneous rocks are rocks that form from the cooling of lava or magma as it is thrown through the air from a volcanic eruption
2
Q
Extrusive rocks
A
Extrusive rocks: igneous rocks that form when lava cools above the Earths surface.
3
Q
Pumice
A
Pumice: a Rock that forms from quick cooling lave to. It is very light and is able to float on water because all their air holes that used full of gases.
4
Q
Scoria
A
A dark rock from glassy lave that cools quickly
5
Q
Abrasive
A
A material that scratches other very easily.
6
Q
Basalt
A
A igneous rock that forms from the cooling of hot lava. It sometimes has holes once contained volcanic gases.
7
Q
Obsidian
A
A black, glassy rock, that breaks into pieces with smooth shell- like surfaces.
