17 terms

soil, rocks, and landforms (investigation 3)

Rocks and Minerals
STUDY
PLAY
sediment
a piece of weathered rock
igneous rock
a rock that forms when melted rock (magma) hardens
sedimentary rock
a rock that forms when layers of sediment get stuck together
metamorphic rock
a rock that forms when other rocks are changed by heat and pressure
mineral
an ingredient of a rock
lava
melted rock on the earth's surface
magma
melted rock below the earth's surface
crust
The outer layer of the Earth
rock cycle
the process of rocks changing into different kinds of rocks
hardness
how easily a mineral can be scratched
streak
the mark left when a mineral sample is rubbed on a tile
luster
the way light reflects off the surface of a mineral
metallic
the luster of a mineral that shines like metal
nonmetallic
the luster of a mineral that does not shine like metal
cleavage
the flat surfaces of broken rocks
fracture
The uneven, rough or rounded or surfaces that some minerals have when they break
property
Something you can observe about an object.