You could use visual aids to explain how gravity works. Take a piece of t-shirt, stretch it over the opening of a bucket, secure it with rubber bands, and then use a variety of marbles and weights on it to show how mass effects the fabric of space and other objects.
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[quote]You could use visual aids to explain how gravity works. Take a piece of t-shirt, stretch it over the opening of a bucket, secure it with rubber bands, and then use a variety of marbles and weights on it to show how mass effects the fabric of space and other objects.[/quote]