Lesson Plan of Energy

Subject General Science

Grade 3^rd

Students` Learning Outcomes

Demonstrate the different forms of Energy.
Define the Heat.
Define the Light.
Define the sound.
Differentiate between transparent, translucent and opaque objects.

Information for Teachers

Teacher knows:

What is energy? (Expected answer may be as; force or vigour of expression or Energy is the ability to do work or heat objects)
Forms of energy (Expected answer may be as; heat, light and sound are different forms of energy)

Heat (Expected answer may be as; heat keeps the things warm. By heating solids change into liquid and liquid into gas)

Light (Expected answer may be as; light helps us to see. Light travels in a straight line)

Sound (Expected answer may be as;

To blow, to strike and to shake are such actions which produce sounds.
Sound is produced by vibrations.)

Transparent Objects (Expected answer may be as; Bodies, through which light completely passes are called transparent objects)

Translucent Objects (Expected answer may be as; Bodies, through which light can partially pass, are called translucent objects)
Opaque Objects (Expected answer may be as; Bodies, through which light can`t pass at all are called opaque objects)

Material / Resources

Writing board, chalk/marker, duster, Sprit lamp, match stick, piece of ice, candles, cardboards, torch, bell

Development

Activity 1

Put some ice pieces in a pot and heat it by a spirit lamp.

What is the effect of heat on ice?
Has the ice changed into water?

Now heat the water more.

Does any change now occur due to heat?(Expected answer may be as; Yes steam starts coming out of water and increases slowly and at last the whole of the water is changed into steam.)
Does the water start taking the form of steam? (Expected answer may be as; By heating a change can be produced in the state of matter i.e. solid on heating change into liquid and liquid when heated changes into gas.)

Activity: 2

Take three similar cardboards. Make holes in all these at the same height. Keep them in a straight line near the edge of the table as shown in the figure. Light the candle on one side of the cardboard and try to see it from the other side.

Do you see the flame?
Now move any one of these cardboards on the left or right side.
Do you still see the flame?
If your answer is in negative, then why does this happen so.

Light travels in a straight line. If any obstacle comes on the way, it stops there.

Activity: 3

Strike the bell with iron rod.
Do you hear any sound?
Touch the bell.
Do vibrations also produce in it?(Yes sound is produced by the vibrations)

Sum up / Close up

Assessment

Give the students following questions and ask them to tell the answer individually.

What is the effect of heat on ice?
Has the ice changed into water?

Now heat the water more.

Does any change now occur due to heat?
Does the water start taking the form of steam?
Do you see the flame?

Now move any one of these cardboards on the left or right side.

Do you still see the flame?

If your answer is in negative, then why does this happen so?

Strike the bell with iron rod.

Do you hear any sound?

Touch the bell.

Do vibrations also produce in it?

Follow up

Write these questions on the board and ask the students to note down on their note books.

What is energy? (Students’ response: Force or vigour of expression.)
What are forms of energy? (Students’ response: Heat, light and sound is different forms of energy.)
What is heat? (Students’ response: Heat keeps the things warm. By heating solids change into liquid and liquid into gas.)
What is light? (Students’ response: Light helps us to see. Light travels in a straight line)

What is sound? (Students’ response:

To blow, to strike and to shake are such actions which produce sounds.
Sound is produced by vibrations. )

What are transparent Objects? Students’ response: Bodies, through which light completely passes are called transparent objects.)
What is Translucent Objects? (Students’ response: Bodies, through which light can partially pass, are called translucent objects.)

What is Opaque Objects? (Students’ response: Bodies, through which light cannot pass at all, are called opaque objects.)