Which Will Bounce Higher - A Rubber Ball Or A Glass Ball?

• A glass ball bounces higher than a rubber ball of the same size, providing it does not break.
• You can certainly test it out for yourself, using a marble and a small rubber ball!
• When a rubber ball hits a surface, it compresses and deforms before returning to its original shape. Quite a lot of energy is lost in this process. 
• A Glass is rigid and does not deform much when it strikes a surface. Most of the energy of the impact returns to the glass.