4-1-WHAT ARE THE SPHERES OF THE EARTH?
pag.66-67
4-2-HOW DOES THE EARTH'S SURFACE CHANGE?
pag.68-69
4-3-WHAT ARE ROCKS?
pag.70-71
4-4-WHAT ARE MINERALS?
pag.72-73
4-5-WHAT ARE ROCKS AND MINERALS USED FOR?
pag.74-75
4-6-OUR ROCKS AND MINERALS' FAIR (INDEX CARDS)
pag.76
4-7-BUY LESS, BUY BETTER
pag.79