NGSS Statement from PS3.B Grade 4 :
Energy is present whenever there are moving objects, sound, light, or heat. When objects collide, energy can be transferred from one object to another, thereby changing their motion. In such collisions, some energy is typically also transferred to the surrounding air; as a result, the air gets heated and sound is produced.
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Motion energy, not a force, is transferred when one marble hits another one. |
A speaker, light bulb, and rock all have energy because all objects have energy. |
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Both a falling rock and a rock on a cliff have energy because all things have energy. |
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