| A | B |
|---|
| heat | the motion of atoms and molecules, also called kinetic energy |
| more heat energy in a solid, liquid or gas is produced by | increased motion of atoms and molecules |
| energy transfer | when molecules come in contact |
| conduction | a kind of energy transfer that happens when atoms come in contact |
| heat conduction | occurs when two materials touch each other. The motion of the atoms and molecules in the warmer material is transferred to atoms and molecules in the cooler material, making those atoms and molecules move faster. |
| how heat transfers from one material to another (conduction) | Material can absorbs radiant energy (light, infrared, ultraviolet) from a radiant source, such as the Sun.This absorbed energy increases the molecular activity in that material. The motion of the atoms and molecules in a warmer material is transferred to atoms and molecules in the cooler material it touches. |
| heat transfer by conduction from atom to atom in a material can only happen | when their atoms and molecules make contact |
| why a canned beverage from a refrigerator feel cold | The atoms and moleclules in the can and in the beverage have less energy (motion) than the atoms and molecules in your hand. Heat transfers from your hand to the soda can by conduction. The molecules in your hand lose energy and move slower. Your hand senses the loss of heat as cold |
| radiation | transfer of energy as electromagnetic waves |
| conductor | A material that conducts heat well |
| insulator | A material that does not conduct heat well |
| thermal expansion | Expansion of matter when it is heated |
| specific heat | Amount of energy required to change the temperature of a kilogram of material by 1 kelvin |
