The Rock Cycle

Rock
- natural
-solid
-mixture of minerals
-rock grains or crystals

Geologists use texture & composition to identify rocks

Geologists classify rocks based on how they form.

Igneous Rock

• magma - inside Earth
• lava - outside
• cooling & crystallization

Sedimentary Rock

• made of sediment
• weathering & erosion form sediment
• deposition of sediment
• compaction & cementation

Metamorphic Rock

• rock under extreme pressure & temperature
• or exposure to chemical fluids

Rock Cycle

• process of changing one kind of rock into another type rock
• any type of rock can change into any other type of rock