Igneous: Igneous rocks form when magma or lava cools. There are 2 types of Igneous rocks: Intrusive and Extrusive.
Igneous Intrusive and Extrusive: Intrusive rocks form inside Earth's surface and have more time to cool which results in bigger crystals. Extrusive rocks form on Earth's surface and have less time to cool which results in smaller crystals.
Sedimentary: Sedimentary rocks are formed when other rocks are weathered and eroded down to sediments.
Sedimentary: The sediments are then compacted under extreme pressure and form Sedimentary rocks.
Metamorphic: These rocks are formed when existing rock is heated and squeezed. They recrystallize and might change chemically.
Metamorphic: Foilated and Nonfoliated: Foilated rocks have distinct visible layers. Nonfoilated have no visible layers.