Page 45 - Science Class 6 Times Publication
P. 45
Candle Fire Burning coal
Electricity
We use electrical energy to run electric heater, rice cooker, electric
bulb, micro oven, toaster, etc. These devices are used to produce heat.
We use electric heater in winter season to make our rooms warm. We
use rice cooker, micro oven, etc to cook food.
Bulb Electric heater Rice cooker
Friction
You must have seen the burning of match stick when it is rubbed
over match cover. Similarly, you must have experienced warmth
produced when your two palms are rubbed with each other. In both
cases heat is produced by friction.
When one body is rubbed with another body, friction is created.
Friction produces heat.
Activity 4.2
Rub your two palms for a few seconds and
put them on your cheek. What do you feel —
warm or cold?
We get heat by rubbing match stick with the surface of match box and
by rubbing two stones.
Times' Crucial Science and Environment 41 Book 6
