This or That
The measure of the average kinetic energy of the particles in a substance, which indicates how hot or cold it is
Temperature
The smallest unit of all matter
Atoms
True or False - The faster the tiny particles of matter move, the colder the matter becomes.
False
The total energy of all particles within a substance due to their random motion, including their vibrational, rotational, and translational kinetic energy
Thermal Energy
What is the total kinetic energy if there are 12 ice cubes a tray and they all have the temperature of 3 degrees each? How do we find out?
36. To find out we just have to add (or in this case multiply) everything up.
12x3 = 36
The transfer of thermal energy that occurs in solids, liquids and gases when two substances of different temperatures touch.
Conduction
True or False - All objects have thermal energy because their atoms are always moving.
True
When a substance is heated, what happens to its atoms?
It moves faster
What is convection?
Convection is the transfer of thermal energy through the movement of fluids
If you put an ice cube instead of a cup of water, the heat will transfer over until both the temperature and thermal energy are balanced.
Equilibrium
What are the three types of heat transfer?
Conduction, Convection, Radiation
Heat transfer occurs through electromagnetic waves.
Radiation
How can two objects have the same temperature but different thermal energies?
Temperature measures average, while thermal energy is the total energy of all particles, so a larger object at a given temperature holds much more total energy than a smaller object at the same temperature.
A pot of soup and a spoon of soup have the same temperature. Which one has more thermal energy?
The pot has more atoms, so more total energy.
A metal spoon is left in a hot cup of cocoa. After a few minutes, the spoon feels warm. What type of heat transfer is happening? How are the atoms in the spoon changing?
Conduction. When a spoon is heated in hot cocoa, its atoms absorb thermal energy, causing them to vibrate much faster and more vigorously about their fixed positions, transferring this energy through the spoon via conduction, making the entire spoon hot.