| A | B |
|---|
| Sustainable | can be used indefinitly |
| heat energy | energy that flows from matter at high to low energy |
| particle model of matter | model that explains behaviour of matter |
| temperature | measure of average kinetic energy of particles in a substance |
| thermal energy | total kinetic energy of particles in substance |
| geothermal energy | heat from lava |
| expands | increase in volume |
| contracts | decrease in volume |
| thermal expansion | expansion of a substance by increase in thermal energy |
| conduction | Heat transfer by connection of 2 objects or more |
| conductors | material that allows heat energy to transfer easily |
| insulators | material that prevents heat energy to move |
| convection currents | pattern of moving liquid or gas particles |
| radiant energy | energy transferredfrom heat source in waves |
| infrared waves | waves of radiant light that transfer heat energy |
| solar array | arrangement of solar cells that are arranged in panels, then positioned to capture and store solar energy |
| heating systems | method of providing and controlling heat |
| thermostats | device to control temp. |
| local heating systems | method of providing thermal energy for one small area only |
| central heating systems | method of transferring heat from a centeral source |
| forced air heating | type of central heating system where air is heated then pushed through the building through pipes, vents, etc. |
| hot water heating | centeral heating system where water is heated by a furnace and is pumped through the building in pipes |
| refrigerant | liquid that evaporates at a very low temp. used in a refrigerator |
| R-value | number that indicates the ability of insulating material to stop or limit heat transfer |
