Overview:
  1. What are rocks?
  2. Different types of rocks
  3. How do the rocks form?
  4. Different uses of rocks
Vocabulary :
  1. Concrete
  2. Gemstone
  3. Granite
  4. Weathering
  5. Gravel
  6. Hard-wearing
  7. Marble
  8. Polish
  9. Slate
  10. Speckled