| A | B |
|---|
| energy | the ability to cause change |
| conduction | the transfer of energy through a solid |
| convection | the transfer of energy through a liquid |
| potential energy | stored energy |
| joule | the basic unit of energy used by scientists |
| kinetic energy | energy in motion |
| work | done if a force moves an object |
| force | a push or a pull |
| resistance forces | forces that resist motion |
| friction | a force created by rubbing that acts to keep objects from moving |
| reading | not an example of work |
| holding a heavy rock | not an example of work because you didn't move it. |
| Produces less friction | putting a box on wheels to roll it |
| formula for work | work= distance X force |
| example of kinetic energy | when a roller coaster starts down the hill |
| example of potential energy | As a roller coaster ride starts up the track |
| convection | air in a room is heated by |
| example of conduction | when a metal pan on the stove transfers heat to the pan handle |
| spring scale | used to measure force |
| speed or direction | energy can make things change |
| can be a good thing | Sometimes a lack of friction |
| Spreading sand on ice will | make the ice less slippery; make the surface of the ice rougher; increase friction between your feet and the ice |
| turning the pages of a book | an example of work because something was moved |
| Ted lifts a rock that weighs 5 Newtons (N) a distance of 3 Meters (M). How much work did he do? | Work= 3 m X 5 N= 15 joules (J) |
