1.) The two types of igneous rocks are intrusive and extrusive. Intrusive rocks form when magma cools beneath Earth's surface. Some examples are granite and pigmatite. Extrusive rocks form when lava cools and hardens on the surface. Some examples are andesite and pumice.

2.) The two main types of metamorphic rock are foliated and non foliated. Foliated rocks appear in layers or bands. Some examples are gneiss and slate. Non foliated rocks do not form in layers. Some examples are marble and quartzite.

3.) The two main types of sedimentary rocks are classic sedimentary rocks and chemical sedimentary rocks. Classic are formed from mechanical weathering debris such as breccia and sandstone. Chemical sedimentary rocks form when dissolved materials precipitate from solution. Some examples are rock salt and limestone.