Anthony D'Aquila, age 9, of Verona, Pa., for his question:

HOW IS A GOLF BALL MADE?

Official golf balls used in tournaments in the United States can weigh no more than 1.62 ounces and must measure at least 1.68 inches in diameter. The golf balls used in Canada and Great Britain have the same maximum weight but they can be as small as 1.62 inches in diameter.

A golf ball is made of rubber thread wound around a core of liquid, rubber or steel. The dimpled cover adds accuracy and distance to the ball's flight when it is hit with a golf club.

A liquid substance fills most of the small sacs in golf balls. Usually water or castor oil and liquid silicone is used.

It takes about 30 yards of rubber thread wound under tension around the sac to make a golf ball.

Some manufacturers also make solid golf balls out of synthetic rubber.