Temperature

1
Temperature

• Heat Expansion

2
Temperature

• When atoms/molecules get warmer, they move
• - this means that the atoms/molecules have more
  energy

3
Temperature

• Temperature is a measure of the average
  energy of the molecules or atoms in a
  substance
• Matter when temperature increases and
  when temperature decreases.
• This is how a thermometer works

4
Temperature

• Temperature is measured on the International
  Scale
• Temperature is to the average Kinetic energy
  of the molecules (not )
• The total energy of molecules in matter is called
  _____________ _____________

5
Heat

• Heat the energy that from one object to
  another because of a temperature difference.
• Energy always flows from

6
Heat vs. Internal Energy

• Hot Coffee
• The hot coffee doesnt _____________ heat.
• It contains a lot of ______________ energy.
• Heat is the energy that moves from the coffee to
  its ______________ (the air, the cup, your mouth)
• Ice
• Even ice contains internal energy. It has ____
  internal energy than hot coffee.
• The heat moves from the __________________ to the
  ____________.

7
Thermal Equilibrium

• If you put the ice cube into the coffee, heat
  will be transferred from the ____________ to the
  _________________.
• The heat will be transferred as long as the
  coffee is higher _________________ than the ice
• Thermal ___________________ 2 objects in
  contact at the same temperature

8
Transfer of Energy

• Heat Transfer
• There are 3 ways in which energy can be
  transferred in the form of heat.
• Conduction
• Convection
• Radiation

9
Transfer of energy

• Conduction-
• Transfer the heat by
• Occurs in solids, liquids, and gases best in
  due to the close proximity of
  atoms/molecules.
• Ex touching a hot pot

10
Transfer of energy

• Friction is the result of two surfaces rubbing
  against each other
• This is a form of the process conduction
• During the process of friction, is
  transformed into

11
Transfer of energy

• Convection
• Transfer of heat by the of matter.
• Occurs in liquids and gases.
• Ex warm air rises and cold air sinks
  (different )

12
Transfer of energy

• Radiation
• Transfer of heat through (vacuum)
• Known as Energy.
• Can occur in matter