RECALL

Limestone undergoes several changes to form ______

• Shale

• Slate

• Marble

• Gneiss

_____ is used to make blackboards

_____, a sedimentary rock is made up of clay

Gneiss is a ____ rock.

• Sedimentary

• Igneous

• Metamorphic

Quartzite is formed when ______ undergoes several changes.

The study of rocks is called _____

Scientists who study rocks are called_________

• Ornithologists

• Geologists

• Physicists