yes but very little
air has mass, so yes.
The temperature of the ball does not affect the surrounding/outside air, but it does affect the air inside the ball.
Bounce is affected by the elasticity of the ball and its internal pressure. The more elastic and optimum pressure, the better the bounce. However, weight is another factor, a heavy ball with the same elasticity and internal pressure as another ball will not bounce as high since force is a function of mass and velocity.
Yes, ofcourse it does. Aerodynamics of a ball are decided by how much air is in the ball. Usually, more air in a ball gives it buoyancy and it travels over a longer distance.
If a ball is more deflated it provides more resistance for the energy to transfer into upwards motion
Yes it would. Speed will depend on Weight of the ball, Incline angle, Friction, and air pressure.
Soccer ball
The combination of the material properties of a ball (surface textures, actual materials, amount of air, hardness/ softness, and so on) affects the height of its bounce.
Weight affects the amount of lift required to raise the weight. Thrust determines how much power is required to move the weight and at what speed.
Because although weight does not have a an affect on how something falls, it does have an affect on wind resistance. So, when a leaf falls it's rather substantial and flat surface area combined with it's light weight causes air to keep it suspended for a longer time. Wind can not keep a bowling ball suspended for very long.
* yes
When the ball is in the air, gravity brings the ball back down.