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energy
Renewable resources | things that will be naturally replaced |
Non-Renewable resources | resources that can not be replaced |
Fossil fuels | energy resources that formed by plants or animals millions of years ago that are burned |
thermal energy | energy that produces heat |
chemical energy | energy from chemicals |
electrical energy | energy from electricity |
sound energy | energy from sound |
nuclear power | energy from nuclear |
light energy | energy from light |
geothermal energy | energy from the earth |
kinetic energy | energy of movement |
potential energy | energy of position |
force | the amount of work to do something |
work calculations | force x distance |
newton | an energy label when measuring weight |
newton meters | a measurement |
friction | when two surfaces rub against one another |
the four factors | soft mats produce more friction and heat than hard high pressure between surfaces causes more friction than low pressurelarge surfaces rubbing against each other more heat than smaller Rough surfaces produce more friction and heat than smoother surfaces |
reduction | making things to reduce friction |
the law of conservation of energy | ---------------------------------------------------------- |
closed system | when a group of objects only transfer energy to each other |
open system | when a group of objects is not touching to complete a closed system |