American Educational Ball and Ring Demonstrating Thermal Expansion -

American Educational Ball and Ring Demonstrating Thermal Expansion

• Brand: American Educational
• The unit demonstrates the expansion of metal when heated and its contraction when cooled
• When either the ball or ring is heated, the ball will not pass through the ring
• When cooled, however, the ball will pass through the ring freely
• The ball and ring are mounted on insulated wooden handles to protect hands from the heat