HOW HEAT RELATED TO THERMAL ENERGY EFFECT OF HEAT TEMPERATURE TYPES OF THERMOMETER HEAT TRANSFER -Conduction -Convection - Radiation

1. HEATEffect of Heat
Temperature
Thermometer and its types
Temperature Scale and Conversion
Heat Transfer

2. How heat related to thermal
energy?
• Any object is said to possess thermal
energy due to the movement of its
particles.
HEAT – is a form of energy that refers to
the thermal energy that is “in transit” or in
the process of being transferred.

3. EFFECT OF HEAT
• When we heat a substance, the
movement of its molecules increases.
This increases the average distance
between the molecules. The heat
causes expansion.
1. Expansion of Solid
2. Expansion of Liquid
3. Expansion of Gas

4. TEMPERATURE
• It indicates the degree of hotness or
coldness of a body or a place.
• It is the quantity that tells how warm
or cold an object is with respect to
some standards.

5. THERMOMETER
-is the device used to measure the temperature.
TYPES:
1. MERCURY THERMOMETER- measure liquid
temperature.
2. ALCOHOL THERMOMETER – measure only up to
78’c.
3. CLINICAL THERMOMETER – measure body
temperature.
4. LABORATORY THERMOMETER – can measure

6. TEMPERATURE SCALE
• The amount of heat transferred is proportional
to the temperature change.
1. CELSIUS SCALE (°C) – by Andres Celsius
2. FAHRENHEIT SCALE (°F) – by Gabriel
Fahrenheit
3. KELVIN SCALE (K) - by William Thomson
Lord Kelvin

7. HEAT TRANSFER
1.CONDUCTION
– takes place between objects that
are in contact with each other.
- Occurs in solids
- Transfers heat from warmer part
of the object to the cooler part.

8. HEAT TRANSFER
1.CONDUCTION
Material Conductivity (K)
Ag
Cu
Au
Al
Ice
Glass
Concrete
Water at 20°C
Rubber
Wood
429
401
318
237
2
1.7
1.1
0.6
0.16
0.04 – 0.4

9. HEAT TRANSFER
2 CONVECTION
– Occurs in fluids (Liquids and
Gas)
- Transfer of heat through the
movement of particles.
Warm particles rise, cool particles
fill in space below.

10. HEAT TRANSFER
3. RADIATION
– Transfer of energy from the sun
- Takes place even in the absence of
material.
- All objects emit and absorb radiation
although some objects are better at
emitting or absorbing radiation than
others.

11. YES OR NO?
1. Any object is said to possess thermal energy.
2. The sun transfers energy to earth mainly by
radiation.
3. The energy is distributed over the earth primarily by
conduction.
4. The mother is able to hold the handle of the pan
with her bare hands when she making a soup
because the handle is made of good insulator and
has low thermal conductivity.
5. Object A has a higher temperature than object B.
when they are in contact, the heat flows from A to
B. this shows that A has greater heat than B.