Heat Test Flashcards
Thermal energy
Total amount of energy in the system calculated by average KE x the number of molecules
Temperature
The thing we measure hot and cold with.
Heat energy
Form of energy that is transferred by change in temp
Celsius
Scale of temperature in Europe
Water freezes at 0 c and boils at 100
Fahrenheit
Scale of temperature used in the US.
Freezing point at 32 c and boiling point at 212 c
Kelvin
Same stats as the Celsius scale made by scientists
0 Freeze 100 boil
Absolute zero
Coldest temperature any substance can reach.
Heat
Representation of the type of thermal energy that flows between two objects
Thermal equilibrium
What happens when two objects are in thermal contact for a long time. They transfer heat between each other becoming the same temperature.
Joules
Unit for heat
Calorie
Unit for heat
Kilocalorie
Same as 1,000 calories.
What does water do when frozen?
The water expands when frozen
Condensation
Way of heat transportation
When heat is transferred by molecules bouncing into each other as the two objects are in contact.
Convection
Way of heat transportation
When hot liquids and gasses flow through a fluid to distribute heat energy
Radiation
Way of heat transportation
Method in which heat gets to earth from the sun without the presence of air molecules.
Conductor
Materials that transfer heat well and have free electrons
Ex: metal
Insulators
Materials that don’t transfer heat well, have tightly packed electrons
Ex: styrofoam,wood, plastic air.
Convection current
When a fluid closest to a heat source will get hot become less dense then rise. When it gets to the top the fluid expands and cools which causes it to become less dense and sink.
Matter phases
Solid, liquid, gas and plasma
Boiling
When a liquid goes to a gas by adding heat
Condensation
Matter goes from gas to liquid
Freezing
Matter goes from liquid to solid
Melting
Solid to liquid
