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Coach Ch 2
5th grade Energy, Forces and Motion
| Term | Definition |
|---|---|
| Energy- | the ability to make things move or change |
| Thermal energy- | the energy of the moving particles that make up all matter |
| Heat- | thermal energy moving from on object or substance to another |
| Electrical Energy- | the energy of moving electric charges |
| Light energy- | energy that we can see |
| Sound energy- | energy that we can hear |
| Medium- | a material through which light travels |
| Reflection- | the bouncing of light off a surface |
| Mirror- | an object with a very smooth surface that forms images by reflecting light |
| Refraction- | the bending of light that occurs when light passes from one material into another |
| Prism- | a clear, or see-through, object that separates white light into all the colors of the rainbow |
| Electric circuit- | the path that an electric current takes |
| Load- | any device that uses electricity |
| Closed circuit- | a complete path for the flow of electricity |
| Open circuit- | an incomplete path for the flow of electricity |
| Conductor- | a material that lets electricity or heat pass through it easily |
| Insulator- | insulator a material that blocks the flow of electricity or heat |
| Experiment- | a controlled test to answer a scientific question |
| Variable- | anything that can change or vary, in an experiment |
| Position – | the place where an object is located |
| Motion- | a change in position over time |
| Force- | a push or pull |
| Direction- | the path that a moving object follows |
| Speed- | a measure of how far an object moves in a certain amount of time |
| Mass- | the amount of matter that makes up an object |
| Friction- | a force that acts between two objects that touch each other or rub together |
| Gravity- | a force that pulls all objects towards each other |
| Magnetism- | the attraction of magnets to objects that contain certain metals, such as iron |
| Magnet- | a metal object that can pull certain other metal objects toward itself |
| Pole- | a region of a magnet where the magnetic force is strongest |
| Attract- | to pull closer |
| Repel- | to push away |
| Magnetic field- | the area around a magnet where it can pull or push |