1. 2.2 Heat and Temperature

2. What is Temperature Really?
• It is all around us – when we wake up in the
morning, in the classroom, outside, and it goes
on
▫ Ex. Weather Channel
• We use many different tools to measure
temperature.

3. Thermometer
• Many different kinds and uses…main examples:
 Weather outside
 Body temperature
• Here are some commonly used ones today:

4. Galileo’s Thermometer
• glass vials float to the top or sink to bottom of
tube based on temperature of water in tube

5. Mercury Thermometer
• The liquid in the tubes goes up and down based
on temperature

6. Infrared Thermometer
• Measures body temperature of a person using a
little tip inserted into the ear

7. Heat Energy and Temperature
• Heat energy transfers from HOT substances to
COLD ones….Always.
• When we take the temperature of anything we
are measure the amount of heat energy.
• The higher the heat energy the higher the
temperature
• Ex. Temperature on a winter day

9. Kinetic Energy and Thermal Energy
• Kinetic – Amount of movement of the particles
 Higher temperature more kinetic energy
• Thermal – Total amount of kinetic energy
caused by all particle movement

10. Heat
• Energy that transfers from one substance to
another
• Ex. Water being boiled to make tea
 Heat is being transferred to make the water hotter
• Ex. Chocolate being melted on the stove
 Heat from stove is transferred to the colder
chocolate

11. • When 40C water mixes with 60C water the
result is…………50C water!!! HEAT TRANSFER

12. Heat Transfer
• When two substances transfer heat without any
electronic assistance they will warm up/ cool
down equally.
• Ex. 40C water mixed with 60C water = 50C
water
▫ 40C + 10C = 50 60C – 10C = 50C
▫ BOTH GAIN/LOSE 10C of temperature

13. Difference Between Them
• Thermal Energy – TOTAL kinetic energy
• Heat – the energy that transfers from a particles
with higher movement to lower movement
(kinetic energy)
• Temperature is just a measurement of kinetic
energy (hot or cold)

14. • This leads us to the next section of Conduction,
Convection, and Radiation.
▫ We will be building our own thermoses to protect
and ice cube from heat
▫ More details to come!!!