| Agent | a natural force or object producing or used for obtaining specific results |
| Archimedes' Principle | the rule that the buoyant force on an object is equal to the weight of fluid the object displaces |
| Inertia | the tendency of an object to resist any change in its motion |
| Kinetic energy | Energy that an object has due to its motion. |
| Law of Conservation of Energy | rule states that energy can't be created or destroyed |
| Mass | the amount of matter in an object |
| Momentum | a characteristic of a moving object that is related to the mass and velocity of an object |
| Receiver | device that detects electromagnetic waves. |
Drag corresponding items onto each other to make them disappear.
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