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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 |