This document discusses different methods of heat transfer including conduction, convection, and radiation. It defines conduction as the transfer of kinetic energy between molecules, convection as molecules moving from one place to another (such as with a fan), and radiation as the transfer of heat through electromagnetic waves without molecular contact. It also discusses measuring temperature with different types of thermometers, materials that conduct heat well versus insulate heat, and how color and materials like wool affect heat absorption.

1. NAME:Chandani chauhan
STD.:B.Ed.(2014-15)
ID:14162063

2. AND TEMPERATURE

3. Coffee Coffee

4. SOLID LIQUID
GASE

5. HEATFLOW
• Conduction
• Convection
• Radiation

7. While conduction involves molecules passing their kinetic
energy to other molecules,
convection involves the molecules themselves moving from
one place to another.
For example, a fan works by displacing hot air with cold air.
Convection usually takes
place with gases traveling from one place to another
Convection

8. Molecules can also transform heat into electromagnetic waves,
so that heat is
transferred not by molecules but by the waves themselves. A
familiar example is the
microwave oven, which sends microwave radiation into the
food, energizing the
molecules in the food without those molecules ever making
contact with other, hotter
molecules. Radiation takes place when the source of heat is
some form of
electromagnetic wave, such as a microwave or sunlight
Radiation

9. TEMPERATURE
Temperature is measure of the degree of hotness of an object.
Our sense of touch is not always a reliable guide to the degree of hotness of Object.

10. Thermometer is a device used for measuring temperatur
Clinical Thermometer
 35 ˚C to 42 ˚C
 Use for body
Laboratory Thermometer
 -10 ˚C to 110 ˚C
 Use for other purpose
Normal temperature of our body is 37 ˚C

11. CONDUCTORS AND
INSULATORS
 The materials which allow heat to pass through them easily are
conductors of heat.
 The materials which not allow heat to pass through them easily
are insulators of heat.

12. • Dark coloured object absorb radiation better than the light
colored object .That is the reason we feel more comfortable in
light coloured clothes in summer
• Woollen clothes keep us warm during winter.It is so becouse
wool is poor conductor of heat and it has air trapped in between
fibers.

13. Conduction Convection
Radiation Laboratory Clinic
Termometere
Heat
Flow of Heat Temperature Conductor Insulater

14. THANK YOU