PROBLEM: How do craters form on the surface of a planets or moon?

PREDICTION: 

EXERCISE 1:
MATERIALS: pan, flour, spoon, measuring stick

PROCEDURE: Put flour in a pan, making a layer 4 to 5 centimeters deep. Level the top of the flour layer. Take your pan outside, or if you work inside, put the pan on top of a sheet of newspaper. Stand on a sturdy chair, so your hand can be about 1 meter above the pan. Drop a leveled spoonful of flour into the pan. You and your partners should do one "drop" each. Look at the flour in the pan. Describe and draw the crater that you have created.

Describe the shape and size of the crater you created.

On the back of this page draw the crater you made.

EXERCISE II:
MATERIALS: 4 photographs of the Moon, magnifying glass

PROCEDURE: Look at the photos of Moon with the magnifying glass. In the space below, record the types of features you see; the number of craters in each picture, and if the crater resembles your flour craters. State if you think the crater is an impact crater or a mare.

CONCLUSION: Is it difficult to determine the nature of craters? Explain your answer.