Game Smartz

Rocks and Minerals

Science

Rocks and Minerals Chapter Video

Rocks and Minerals Chapter Video

cleavage

the tendency of a mineral to break along flat surfaces
cleavage Simple Definition

crystal

a solid of ions or atoms arranged in an orderly three-dimensional pattern
crystal Simple Definition

density

an object’s mass per unit volume
density Simple Definition

fracture

an irregular break in a mineral
fracture Simple Definition

gem

a rare, valuable mineral
gem Simple Definition

hardness

a mineral’s resistance to scratching
hardness Simple Definition

lava

molten rock that reaches the Earth's surface
lava Simple Definition

luster

the way a mineral's surface reflects light
luster Simple Definition

magma

molten rock beneath the Earth's surface
magma Simple Definition

mineral

a natural inorganic solid with definite chemical composition and structure
mineral Simple Definition

ore

a rock that contains enough mineral to be mined for profit
ore Simple Definition

silicate

a mineral with silicon, oxygen, and other elements
silicate Simple Definition

streak

a color of a mineral in its powdered form
streak Simple Definition

Related Chapters