Thermal Energy
What type of energy do all moving particles have?
Kinetic
Which state has tightly packed particles?
Solid
What type of heat transfer warms you from a fire without touching it?
Radiation
Heat always transfers from a __________ object to a _______ object.
Warmer, to cooler
What usually happens when thermal energy decreases?
Contraction
What happens to thermal energy when temperature increases?
It increases.
Which state has particles that can slide past each other?
Liquid
Heat transfer by direct contact.
Conduction
This type of material slows or blocks the transfer of heat, keeping thermal energy from moving quickly.
Insulator
What is thermal energy made of?
The total kinetic and potential energy of particles.
Which heats up faster, sand or water?
Sand
Which state spreads out to fill any container?
Gas
Heat transfer through fluids.
Convection
This type of material allows heat to pass through it easily because its particles transfer energy quickly.
Conductor
When particles gain energy, thermal energy increases, and particles spread apart, the object is said to do what?
Expand/ Expansion
Temperature measures the __________ kinetic energy.
Average
Does a liquid have a definite shape or volume?
no definite shape, but does have definite volume
Heat transfer by electromagnetic waves.
Radiation
This term describes the amount of energy needed to raise the temperature of one kilogram of a material by one kelvin.
Specific Heat
When you touch a metal spoon that was sitting in a hot pot and feel the heat travel through the spoon, what type of heat transfer is that?
Conduction
________________is the total energy of all the particles in a substance, while ______________is the transfer of that energy from a warmer object to a cooler one.
Thermal Energy, Heat
Does a gas have a definite shape or volume?
neither
What forms when warm air rises and cool air sinks?
Convection Current
Why does the metal lid loosen under hot water?
The metal expands more than the glass.
Give one example of a conductor and one of an insulator
Metal, aluminum, iron, steel - is a conductor. Rubber, wood, wool, plastic, glass - is an insulator.