LESSON PLAN
SUBJECT : Physics
Exploring Physics Through Demonstrations
SUBJECT : Physics
Exploring Physics Through Demonstrations
“Tell me, and I will forget, Show me, and I may remember, Involve me, and I will understand.”
Ø Skills development
Science process skills like observation , making prediction , measurement , Science Communication , Experimenting , Team work .
Ø Anticipated Students Misconceptions :
Students usually could not apply more than one concept in explaining a problem . On the other hand real life examples demand applications of many concepts in one problem .
Ø Lesson Development :
Demonstartion : 1: Dippy Bird
Learning Goals : Learners would be able to
comprehend concepts like Equilibrium Pressure , Evaporative Cooling, Motion of Liquid due to pressure difference, Centre of Gravity .
Describe the working of model in their own words.
2. Model of Working Dippy Bird
The drinking bird (also called a dippy bird or dunking bird) tilts up and down in response to the temperature difference between the top part and bottom part of the bird. The top and bottom parts of the bird consist of two glass bulbs. These two glass bulbs are joined with a glass tube. The top bulb is decorated to look like a bird's head. The head and beak is covered with felt-like material, and the remaining body is constructed as shown.
Working : To operate the Dippy Bird, you get its head wet. As the water evaporates, fluid moves up into the head, causing the bird to become top-heavy and dip forward. Once the bird dips forward, fluid moves back into the abdomen, causing the bird to become bottom-heavy and tip up.
Here is how a Dippy Bird works:
1. When water evaporates from the fuzz on the Dippy Bird's head, the head is cooled.
2. The temperature decrease in the head condenses the methylene chloride vapor, decreasing the vapor pressure in the head relative to the vapor pressure in the abdomen.3. The greater vapor pressure in the abdomen forces fluid up through the neck and into the head.
4. As fluid enters the head, it makes the Dippy Bird top-heavy.
5. The bird tips. Liquid travels to the head. The bottom of the tube is no longer submerged in liquid.
6. Vapor bubbles travel through the tube and into the head. Liquid drains from the head, displaced by the bubbles.
7. Fluid drains back into the abdomen, making the bird bottom-heavy.
8. The bird tips back up.
If the bird dips into a cup of water, the fuzzy material absorbs water again and the cycle starts over.
Demonstration - 2 : Small Toy having Spring
Learning outcomes :
Learners would be able to
1. Apply the conservation of energy principle in explaining the toy’s working .
2. Explain working of toy in their own words .
3. Cite other related examples from daily life
Instructional Aids :
2. Picture Display on Smart Board .
Working Principle : Its called conservation of energy. A wind up toy consists of a spring which is attached to a winder. When the winder is rotated the energy used to rotate the winder is stored in the spring in the form of potential energy. After releasing the winder the spring tries to unfold and the stored potential energy is converted into kinetic energy which is then transferred to the gears attached to the spring.
Student’s Section :
After teacher’s demonstrations , students would also be motivated to show their respective activities which they have prepared enthusiastically .
Ø Assessment :
· Formative Assessment :
During the lesson development , students would be asked questions and from their responses formative assessment would be made .
Summative Assessment :
As home task , students would be asked to
1. design a small activity explaining concepts of Physics .
2. Take any example from daily life and explain Physics concepts behind that .
Ø Internet Resources/ Instructional materials
2. Changing the area to change the Pressure : https://www.youtube.com/watch?v=4xtnd_leKcM
5. Learning Through Toy Design and Development by Arif Sirinterlikci ,Linda Zane , and Alee L. Sirinterlikci
