Heat energy Flashcards
Measurement of heat :
Joules
Measurement of temperature :
°C and °F
Heat energy :
Anything that is moving has kinetic energy, the faster it is moving, the more kinetic energy it has. The total kinetic energy of moving particles of matter is called heat energy.
Does all matter have heat energy?
all matter has heat energy even matter that feels cold. That’s because the particles of the matter are in constant motion and have kinetic energy.
Heat :
Heat is the transfer of thermal/heat energy between substances. Heat is the TOTAL kinetic energy of particles of matter.
Temperature :
Temperature is the AVERAGE kinetic energy of particles of matter. When particles of matter move more quickly they have more kinetic energy, so their temperature increases.
Movement of heat :
Thermal/ heat energy always moves from hot to cold. Hotter substances give off heat to cooler substances.
Heat, and the color white :
The color white doesn’t absorbs heat. It reflects heat.
Heat, and the color black :
Dull and dark colors like black are very good at absorbing heat, as well as emitting heat. Heat can be taken in and out of dark colors very easily.
Heat, and shiny or reflective colors :
Silver, shiny, and reflective colors or materials are used to reflect heat. There color doesn’t allow heat to be absorbed or taken in instead the heat is reflected away.
3 types of heat transfer :
Conduction
Convection
Radiation
The type of heat transfer that doesn’t require matter?
Radiation is the only form of heat transfer which does not require matter to be involved. Thermal radiation is the transfer of heat energy through waves that can travel through air or oven empty spaces.
Kinetic theory :
All things are made out of particles, and that the particles are always moving.
Convection Currents :
A process that involves the movement of energy from one place to another also called “convection heat transfer”.
Density :
A measure of how much mass is packed into a given volume of a substance, indicating how heavy or compact it is relative to its size.
Why is trapped air a good insulator?
Trapped air is a good insulator because it reduces heat loss by conduction and convection.
Heat emitters :
Objects that release heat through radiation.
Cavity :
A empty space or hole, they can be used in walls, windows and other area in order to create insulation.
Thermal expansion :
When molecules heat up and move faster, they spread apart and objects expand.
Fluid :
Anything that has loosely moving molecules, which can move easily from place to place. Which are liquids and gasses.
