There are many factors affecting the bounce of a ball or much it makes; such as the material where the ball is made from and the type of floor where you dropped the ball. According to Ohman, hard surfaces, such as concrete, absorbs less energy compared with a soft surface, such as a carpeted floor. When a ball bounces of a surface, the energy from that ball was absorbed by the surface. Some absorb more energy than others do. The more energy absorbed by the surface, the less the ball remains to bounce. When the basketball is dropped on a relatively hard surface; it bounced higher (it lost less energy) compared with when it was bounced on a softer surface (where it lost more energy). According to Josuweit, the rubber ball has the great elasticity, so it will bounce really well. When the rubber ball hits the ground it gets compressed, and because it is very elastic, it quickly returns to its original shape. When it does this, it pushes back on the ground shoots back up into the air. Elastic materials, like rubber, can be stretched and then return to their normal shape. The material where the ball is made from may it be rubber, plastic, polyester or cotton will affect its bounce. According to Osborne, the outer coverings of balls have a lot to do with the bounciness of the ball (elasticity). As the ball is in play, outside of the ball wears off, changing the ball’s total mass. The same hold true for basketballs, baseballs and other balls.