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Chapter 4 Energy
test
| Question | Answer |
|---|---|
| Energy | ability to do work or cause change |
| Joules | measures energy |
| Kinetic Energy | moving energy |
| Potential Energy | stored energy |
| Elastic Potential | when an object is pulled or stretched out of normal shape, releases energy when returned to normal shape |
| Mechanical Energy | Potential + Kinetic or (motion) |
| Chemical Energy | stored in chemical bonds, example: food |
| Nuclear Energy | stored in an atom's nucleus- /produce sunlight |
| Electromagnetic Energy | travels through space waves, example: x-rays/radio waves/microwaves |
| Thermal Energy | the total kinetic and potential energy within an object (heat) |
| Energy Transformation | one form of energy to another (changes form) |
| Energy Transfer | no change in form |
| Law of Conservation of Energy | energy is lost nor created- only changes form |
| Direction of heat transfer | hot to cold |
| Conduction | when objects touch heat is transferred |
| Convection | only in fluids such as water or air (moves in a cycle) |
| Radiation | fire= feel without touching, radiation does not need matter |
| Power | rate work is done |
| need to know..... | when energy transforms from kinetic to potential/ potential to kinetic the total sum of energy doesn't change!! |
| need to know..... | work- transfer of energy, work is a force exerted on an object |
| Work is done when a force is exerted on an object , makes the object move in the direction of the force -- this is a transfer of energy | Power is a rate at which work is done or transfer of energy over time |
Created by:
mysvandy
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