7th Science CH test Energy and Resources
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24 terms
Terms | Definitions |
|---|---|
 energy | when a bat bits a baseball, this is transferred from the bat to the ball |
| kinetic energy | as a baseball flies through the air after being hit, this is the type of energy it has |
| KE = mv/2 | This is the formula for finding kinetic energy |
| friction | a force that opposes motion between two surfaces that are touching |
| this happens when electrical energy is changed to thermal energy | energy converstion takes place |
| when you eat fruits and vegetables, which types of energy are you taking in | chemical energy |
| growing an apple tree | is a conversion from light energy to chemical energy |
| gravitational potential energy | the energy that is given to an object that is lifted |
| energy | the ability to do work |
| light energy | the energy that is produced by vibrations of electrically charged particles |
| kinetic energy | the energy of motion |
| potential energy | the energy an object has because of its position |
| sound energy | the energy caused by an objects vibrations of electrically charged particles |
| mechanical energy | the total energy of motion and position of an object |
| thermal energy | all of the kinetic energy due to the random motion of the particles that make up an object |
| electrical energy | the energy of moving electrons |
| radiometer | can measure the energy from the sun |
| when is the potential energy the greatest in a roller coaster | at the top of the first hill |
| after an energy conversion, you end up with the same total amount of energy as the original amount of potential energy. This law explains this rule | law of conservation |
| thermal energy | the original energy is converted any time an energy conversion takes place |
| energy effciency | is found when you compare the amount of energy before a conversion with the amount of energy present after a conversion |
| fossil fuels are considered | nonrenewable resources |
| electric generator | this converts kinetic enrgy into electrical energ |
| wind energy | this is a renewable resource. |
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