Classification: grouping things together that are alike in
some way
Conglomerate: sedimentary rock made from pebbles and granite
Coquina: sedimentary rock formed from sea shells that are
cemented together
Gneiss: metamorphic rock with bands of minerals
Igneous rocks: rocks formed from the cooling of hot, melted
materials
Lava: Magma that comes through the earth’s surface
Limestone: sedimentary rock made up of calcite
Magma: melted rocks and minerals inside the earth
Metamorphic rocks: Rocks formed when heat or pressure or
both change other rocks
Molten: melted
Particle: a small piece of solid material
Pressure: a pressing force
Sandstone: sedimentary rock made of sand
Schist: metamorphic rock showing minerals flattened into
bands or sheets
Sediment: solid material that settles to the bottom of a
lake or ocean
Sedimentary rocks: rocks formed by the cementing of small
particles together
Shale: sedimentary rock made from mud and clay
Slate: metamorphic rock that forms from shale and that
breaks into flat sheets
Texture: the size of the crystals in a rock