How often do we use energy changes in daily life? Tabulate a few domestic uses of energy.
Situation
Energy conversions taking place
Bulb glowing
Working an electric motor to pump water
Lighting a match stick
Working a mixer grinder
Listening to the news on the radio
Important Questions on The Essence of Change
Identify the forms of energy used and not used, the forms of energy produced, and energy changes that occur in each case and record them in the flow chart shown below:
Examine the pictures:
Which form of energy undergoes change in each situation? What are the forms of energy produced?
Examine the pictures
Which situation in the given picture does not use light energy?
Examine the pictures:
In which situation is sound energy produced?
Examine the pictures:
In which situation is heat energy made use of?
Try doing the experiment given below and write your observations:
Take some ice cubes in a beaker and heat it as shown in the figure.
What changes do you observe?
Try doing the experiment given below and write your observations:
Take some ice cubes in a beaker and heat it as shown in the figure.
Which form of energy was utilised by ice to undergo the changes?
