Lesson Plan of Effects of Heat on Matter

Lesson Plan of Effects of Heat on Solids, Liquids and Gases

General Science Grade IV

Students’ Learning Outcomes

·         Demonstrate and explain how matter changes its state on heating.

Information for Teachers

·         One state of matter can be changed into another by heating.
·         Solid ice changes into liquid water with heat or keeping it at room temperature for some time.
Effects of Heat on Matter
·         Similarity liquid water changes into steam (gas) on heating.


Material / Resources

Ice, water, glass, candle, match box, stainless steel glass, handkerchiefs, textbook

Worm up Activity

·         Take a handkerchief and soak it in water.
·         Ask students to touch it.
·         Spread it out in the open air for half an hour.
·         Show it to the students and ask them to touch it again.
·         Ask students what happened to the handkerchief?
·         Where did the water go?
(Expected response: Water escape in air in the form of vapors)
Effects of Heat on Matter
·         How did the liquid water disappear or change into vapors?
(Students’ response: water absorbed heat from surroundings and changed into vapors)


Activity 1

·         Place some pieces of ice in a glass.
·         Heat the glass gently with the help of a candle or a spirit lamp.
·         Ask the students to observe what will happen to the ice and why.
·         Students observe and then answer the following questions:
·         What happened to the ice? (it melted)
·         How did it change into liquid water? (by heating)
·         Inform them that upon heating, a solid changes into liquid. Ask them:
·         Why does water trickle down from a vehicle carrying ice?
·         Why does a burning candle melt?

Activity 2

·         Take 10-15ml water in a stainless steel glass/beaker or any container.
·         Heat it with the help of a candle or a spirit lamp.
·         Ask students to observe and then answer the following questions:
·         What has happened to liquid water?
(Students’ response: Heat has changed water to steam or water vapors)
·         Which state of matter is steam? (Steam is gas)
·         Conclude that upon heating a liquid turns into gas vapors.
·         Ask what will happen if we keep heating water?
(Expected response: water will turn into steam)
·         Why does sweat dry while sitting under a fan?
(Expected response: Sweat will change into vapors)

Sum up / Conclusion

·         Conclude the topic by telling that: One state of matter can be converted into another state either by heating or cooling.
Effects of Heat on Matter
·         Liquid water can be changed to steam or vapors by heating.
·         Water vapors present in air can be changed to liquid water by cooling.


·         Ask students: Write their observations from everyday life where water is changed into steam and into ice.
·         When ice is placed in an open container it melts into liquid water after sometimes. From where does it get heat?

Follow up

·         Instruct them to:
v  Take a small quantity of water in a plate.
v  Put that plate under the sun.
v  Observe what happens to the water after a few hours.
(Students’ response: the whole water has disappeared and the plate has dried up)
·         Ask the students to note down their observation and discuss with their class fellows next day.


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