Children explore how different forces make objects move and how the shape of an object determines whether it will roll or slide.
Down the Ramp
Children explore how the steepness of a ramp affects how fast and how far an object slides or rolls.
Rolling Down a Pathway
Children explore how texture and friction affect how far and how fast objects roll and slide. As an end-of-unit project, they work in groups to build long marble run pathways, starting at a high point and ending at floor level.
SAFETY NOTE: Marbles can be a choking hazard to children. It is important to make sure children understand that they are never to put marbles in their mouths. Monitor children when they are playing with marbles to ensure that they are using them responsibly and safely.