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Unit 3 Force
CIS 5th Grade Vocabulary
| Term | Definition |
|---|---|
| Push | To press against an object to move it away. |
| Pull | To move an object toward or near another object. |
| Force | A push or pull that causes an object to move, stop, or change direction. |
| Balanced Force | An equal push on both sides of an object which results in no change in motion. |
| Unbalanced Force | An unequal push on one side of an object which results in a change in motion. |
| Position | The place where something is located; where something has been put. |
| Motion | A change in the position of an object. |
| Gravity | A force that pulls objects toward each other. |
| Friction | The force that resists motion when two surfaces rub against each other. |
| Weight | The force gravity exerts on an object's mass. |
| Magnetism | A force of attraction between a magnet and certain types of metals. |
| Inertia | The tendency of an object in motion to remain in motion or an object at rest to remain at rest unless acted upon by an unbalanced force. |
| Testable Hypothesis | An idea that can be tested by experiment or observation. |
| Variable | A condition or factor that changes in an investigation so the effects can be observed. |
| Control | The substance, object, or group in an experiment that is not changed. |
| Valid Conclusion | Information describing what was learned from an investigation based on observations and collected data. |
| Reliability | The quality of data to be true, correct, and dependable. |
| Spring scale | is a weighing scale used to measure weight or force, such as the force of gravity, the strength of a persons grip or the power of a vehicle |
| Simple Machine | any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work. |
| Inclined plane | a flat surface that makes an angle with the line of the horizon |
| lever | is a long, sturdy body that rests on a support called a fulcrum |
| wedge | is a simple machine used mainly to put in between two stones. |
| wheel and axle | a wheel with a rod attached in the middle as an axle to help it to lift or move loads |
| pulley | a simple machine that makes lifting something easier. |
| screw | is a special kind of inclined plane. It's basically an inclined plane wrapped around a pole. |