Kinetic Energy
The speed of particles (kinetic energy) in a liquid substance is mostly due to its _________.
Temperature.
Which of the following factors contributes most to the amount of energy required to change the temperature of a sample of water by 10°C?
A The source of the sample of water
B The size of container holding the sample
C The initial temperature of the sample
D The amount of water in the sample
D The amount of water in the sample
What is the type of energy transfer that happens through direct contact? (ex:touching a hot surface)
thermal energy exchange between two objects of different temperatures is called ____ _______
Heat Transfer
1) Kinetic energy is the energy an object has due to its ________.
Motion
A measure of the average kinetic energy of the molecules within a substance.
Temperature
Conductors serve to __________ the transfer of heat energy. (ex: metal)
Increase
A heat lamp at a restaurant keeps the food warm by radiation.
Radiation
Put the states of matter in order from greatest kinetic energy to least kinetic energy.
Gas, liquid, solid
The higher the temperature is the ______ the kinetic energy?
more.
Which type of energy transfer happens where the warmer air rises and the cooler air sinks?
Convection
______ The transfer of heat by the movement of currents of liquid or gas
Convection
The _____ of the particles determines the temperature of a substance.
speed
The average velocity of molecules in a high-temperature gas is _______ than the average velocity of molecules of the same gas with a lower temperature?
(Think about speed and KE)
The average velocity of molecules in the high-temperature gas is FASTER than the average velocity of molecules in the same gas with a lower temperature.
Heat given off from a light bulb is considered what kind of heat transfer?
Radiation
When ice cubes melt in a glass of water, a current forms in which heat energy moves from particles with a higher temperature to particles with a ____________________ temperature.
lower
When soup is cooling down to room temperature on the table it is trying to reach ______ ________.
Thermal equilibrium
What are the three units for temperature?
Celsius, Fahrenheit and kelvin
If two objects have different temperatures, in which direction will heat move?
High to low or hot to cold
When both cold and hot water are trying to reach room temperature that is called reaching thermal _________.
equilibrium