8th Grade Science
- Kinetic energy: energy of motion
- Temperature: measure of the average kinetic energy of matter within a given substance – The higher the kinetic energy, the greater the rate of random motion, and the higher the temperature.
- Heat: thermal energy or the total of all energy within a substance – It can also be described as the transfer of thermal energy.
- Equilibrium: the attainment of invariability in a “closed system”
- Law of Conservation of Energy: Energy can be converted from one form to another, but can neither be created nor destroyed.
- Heat transfer: the transfer of thermal energy from areas of high temperature (kinetic energy) to low temperature (kinetic energy)
- Freezing point: the temperature at which a liquid becomes a solid – At the freezing point, there are equivalent amounts of liquid and solid molecules. Above the freezing point, the liquid form of matter predominates. Below the freezing point, the solid form of matter predominates.
- Boiling point: the temperature at which a liquid becomes a gas – Above the boiling point, the gaseous form of matter predominates. Below the boiling point the liquid form of matter predominates.