What are the three main types of rocks?

How long does it take to form a sedimentary rock?

How do you tell the age of the layers in a sedimentary rock?

How are igneous rocks form?

How are crystals formed?

Do igneous rocks contain fossils?

How are metamorphic rocks formed?

What are the three types of weathering?

How does the wind, rain and waves cause weathering?

What are the stages of the rock cycle?