| A | B |
|---|
| energy | ability to make something happen |
| potential energy | stored energy |
| kinetic energy | energy of motion |
| gravitational potential energy | stored energy in the water because of its position |
| What 2 factors does gravitational potential energy depend on? | weight and height |
| chemical potential energy | potential energy is stored in the chemicals |
| What 2 factors odes kinetic energy depend on? | mass and velocity |
| What are the 7 main forms of energy? | McHales-mechanical, chemical , heat, atomic , light, electrical, sound |
| mechanical energy; | energy in moving things it can occur as potential or kinetic energy |
| electrical energy | energy in the form of moving electric charges |
| electromagnetic energy | energy that can travel through a vacuum, visible light, X-rays, radio waves, and microwaves |
| heat energy | thermal energy, the energy of of the moving particles that make up matter |
| chemical energy | energy that holds particles of matter together |
| atomic/nuclear energy | energy stored in the nucleus of an atom |
| Can energy change from one form to another? | yes, potential and kinetic enrgy often change form |
| thermal pollution | damage that occurs when wate heat enters the environment |
| What happens when energy changes form? | some of the energy is always changed into heat |
| Law of Conservation of Energy | Energy cannot be made or destroyed, but only changed in form |
| work | force exerted through distance |
| When are you doing work? | Work is done when a force moves an object a certain distance |
| Work = | force X distance |
| If two boys were trying to push a car stuck in mud and could not move it, did t he boys do any work? | No, for work to be done something must be moved. |
| When force moves an object... | work is done |
| For work to be done.... | a force must make an object move in the same direction as the force |
| What is nature's ability to do work? | Nature supplies energy to do all kinds of work ex. wind, moving water, hurricanes, tornadoes, floods, and earthquakes |
| What must you know to measure work? | amount of force used to move an object and the distance the object moves |
| What unit is work measured in? | newton-meter |
| joule (J) | is when a force of 1 Newton moves an object 1 meter . 1J= 1 N-m |
| power | the amount of work done per unit of time, the rate at which you do work |
| What do you need to know to measure power? | amount of work done and time needed to do the work |
| power = | work / time |
| SI unit of power | watt (W) |
| Who is the watt named after? | James Watt who built a steam engine |
| 1 kilowatt = | 1000 W |
