Rock Types

sedimentary

A type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together

metomorphic

rocks that form when an existing rock is exposed to extreme heat and pressure are

Igneous

A type of rock that forms from the cooling of molten rock at or below the surface

extrusive igneous rock

Rock that forms from the cooling and solidification of lava at earth's surface

intrusive igneous rock

Rock formed from the cooling and solidification of magma beneath Earth's surface

minerals

A solid inorganic substance of natural occurrence.

sediment

tiny pieces of rocks that are broken off from other rocks

magma

Molten rock beneath the earth's surface

lava

Magma that reaches Earth's surface

hardness

A measure of how easily a mineral can be scratched

luster

How light reflects off a mineral

erosion

Processes by which rock, sand, and soil are broken down and carried away (i.e. weathering, glaciation)

weathering

The breaking down of rocks and other materials on the Earth's surface.

how is an igneous rock formed

cooled magma

how are sedimentary rocks formed

the sediments are weathered, compacted, and cemented together

how are metomorphic rocks formed

when heat and pressure pushes down on the rock under the surface

minerals mixed together make ________________

rocks

rock

A naturally occurring solid mixture of one or more minerals or organic matter

one type igneous

obsidian

one type of sedimentary

sandstone

one type of metomorphic

quartzite