Rocks
Sedimentary Rock
Sedimentary rocks are formed when eroded fragments of old rocks and dead organisms settle (usually in seas or rivers) to form a sediment. Over millions of years, layers of sediment build up and are buried one on top of the other. They are compressed, and their weight squeezes out the water. Eventually the pieces of rock in the sediment become bonded together to form sedimentary rocks.
Sedimentary Rock
Igneous Rock
Igneous rocks are formed when hot, molten rock (called magma) cools and solidifies. There are two main types of igneous rock, depending on where the magma cooled:

Igneous Rock (THINK FIRE)
Metamorphic Rock
Metamorphic rocks are formed when existing igneous or sedimentary rocks are changed by pressure and heat, but without melting. This can happen by contact with cooling igneous rocks, or at the edges of tectonic plates, where very high temperatures and pressures occur as mountains are being formed.
Metamorphic Rock (THINK CHANGE)
Powermediaplus has a movie on the rock cycle
The Rock Cycle-learn about how rocks are formed
Recipes for making geologic snacks-celphalopods in a blanket, cheese and bugles coral reef
there is even a recipe for trilobite cookies
another link for Rock cookies-igneous, sedimentary and metamorphic

