Question: what happens to the land when water flows over it?
hypothesis: that it will form a valley
materials: water, two cup with hole, tray, sand, rule, computer, wooden wag, clay, bucket .
procedure: we put sand and clay 28cm in the tray and then put it on the wooden wag then put the water in the cup with a hole and poured water in it and put the bucket near the tray on the ground.
