Scientist often define energy as the ability to do work. Some of the of the most important advancements in modern society have centered on changing energy from one form to another form that can more easily perform work. We have learned to transform energy to move cars on roads, light our cities at night and even send rockets into space.
And there are many different forms of energy including heat, light, electrical, mechanical, chemical, and gravitational energy.
Energy allows us to do hundreds of important things. But to be able to use it efficiently, we often have to transform it from one form to another. For example, gasoline contains lots of chemical energy that is stored in the bonds of the gasoline molecules. But to be able to use it effectively, we had to develop combustion engines that convert the chemical energy into mechanical energy to move the tires. Thanks to some excellent engineering we now have flashlights that convert chemical energy into light energy. Solar panels that convert radiant energy into electricity, wind turbines that turn wind energy into electricity, and, thank goodness, TV’s that convert electrical energy into sound and light energy.
Next Generation Science Standards:
4-PS3-4 Energy
Apply scientific ideas to design, test, and refine a device that converts energy from one form to another.*
MS-PS3-5 Energy
Construct, use, and present arguments to support the claim that when the kinetic energy of an object changes, energy is transferred to or from the object.
HS-PS3-3 Energy
Design, build, and refine a device that works within given constraints to convert one form of energy into another form of energy.*
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