Topics of this game:
- force of gravity acting on an object , will change if the force of gravity changes
- amount of matter in an object
- force that happens when two things rub together
- force that attracts or pulls a being to the center of an object
- any physical movement or change in position or place
- An object can affect other objects even when they are not touching.
- Friction is the universal attraction between all objects even when they are not touching.
- Objects in contact uses forces on each other.
- The moon gives the Earth gravity.
- Weight can change if you are on the moon because of lack of gravity.
