THINGS TO THINK ABOUT
Have you ever read stories not written in books?
Can you think how large pieces of rock get broken off from the cliffs?
Can you think how they become smooth and rounded?
How do you think that the pebbles you find along the stream got there?
See if you can track a pebble up the valley of the stream in which you found it.
What does the river take with it as it journeys toward the sea?
What part of its load drops first?
How People Know What the Cave-men Did