Lesson Plan

Name of Lesson Author Grade Learning Area Learning Outcome

Energy and Change Loin`s Group 7 Natural Science Lo1: Scientific investigation AS.2: Conducts Investigations and Collects Data, Organizes and uses equipment to gather and record information, relates observation and responses to focus questions. AS1.3 Evaluating data and communicating findings and generalized in terms of a relevant aspect and communicates.

Materials, Measurements, Data Required :Computer Candle, Holder, Metal teaspoon, Matches,Tripot,Heat-proof glass beaker, Water, Small Lump of Potassium Permanganate crystals, Heater or Iron,Carboard squares to cover tins thermometer,3 tins of equal size painted black white and silver respectively. Time Required 90 Minutes Activities and Procedures Educator’s Activity A.Prior Learning An educator asks Learners to answer the following Questions in groups 1. What do you understand about the concept “Transfer of energy”. 2. Explain Where conduction takes in everyday life. 3. Is there a difference between conduction and convection? 4. What type of car would be the hottest: Car Painted black or white? B.Explains the process of conduction ,convection and radition. e.g. Conduction

Cooking Pot

Conduction

Radiation

Boiling Water in Kettle

Sun Heating the Earth

Movement of Heat through solids

Movement of Heat through liquid or gases

Movement of heat through an heat empty space

Particles Vibrates

Particles move about freely

Transfer of energy in the form of wave

C Guides and gives learners instructions to: 1. 2. 3. 4.

To investigate heating by conduction To investigate heat by convection. To investigate heating by convection. To investigate heating by radiation (absorption)

D ICT skills and resources An educator gives learners a home-work to go and do research from the internet so to get more information about energy and change. Learners Activity (Lerner Centered) Activity 1 Investigating Heating by Conduction Resources: • Candle • Holder • Metal Teaspoon • Matches

Instructions  In groups of four light the candle and hold the spoon over the flame  Take note of what happens  Records your observations  Answer the question that follows based on your observation.

Questions 1. Was the spoon cold to star with? 2. Did it become warm after a while or immediately? 3. How long did it take before you could not hold the spoon in your hands any longer? 4. If you where forced to hold onto the spoon, what would happen to your hands? 5. Is the spoon a liquid or solid? 6. Heat energy was transferred from the flame to the spoon. The movement of heat energy along the spoon is knows as_____________

Activity 2 Investigating Heating by Convection Resources: • Candle • Tripod • Heat-proof glass beaker • Small lump of potassium permanganate Crystals.

Instructions • • • • •

Fill the beaker with cold water and place it on the tripod. Place the candle to the side of the beaker under the tripod. Place a permanganate lump in the corner of the beaker closest the candle. The purple colour of permanganate will enable you to observe the moment of the heated water. Observe and answer questions that follow

Questions • • • • •

Does the colored water stay where it is or does in move? How happens when it gets to the top? How does heat energy transfer take place in the water? Describe the movement of water and draw a diagram to show how the currents of hot water move. Where do we find these interesting currents in our daily life?

Activity 3 Investigating Heating by Radiation (absorption) of heat energy Resources: Heater or an iron. Cardboard squares to cover tins Thermometer 3 Tins of equal size painted black, white and silver respectively.

Instruction Fill all three containers with equal quantity water and place them in front off the heater. Measure temperature of a record it. Switch the heater on for 15 Minutes and the temperature of water in each tin again. Switch off the heater and record your findings. Discuss and record the difference in temperature bearing in mind absorption and reflection of heat energy. What conclusions have reached?

Practical Applications Conduction: Do you understand why the handles of pots usually have “plastic” Coated areas?explain Convection: Opening windows at the bottom and having an air vent at the top ventilate rooms. Explain how a convection heater warms a room. Radiation: Black or Dark Surface are good absorbers of heat but also good radiators of heat. Explain Why.

Procedure Learners Need to follow all the given instructions Follow up activity Assessment (Rubric) Group A ,B, C , D 1. Poor 2 Fair 3. Good .4. Very Good 1 2

Codes Questions 1.Are learner able to work together as a group 2.Are learners taking notes of what happens 3.Are learners able to answer questions 4.Are learner able to follow instructions. 5.Are learners able to discuss the difference in temperature and reflection of heat energy. 6. Are learners able to give conclusion?

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Student Follow up •

Learners will be able to describe the transfer of heat energy by means of conduction, Convection and radiation.

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They will also recognize and explain the movement of heat through solid by conducting, Liquids and Liquids and gases by convection and through waves by radiation. They will know and be aware of the practical application of conduct ion and radiation. They will also apply concept of convection to familiar situations.

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Dependencies Each group member has his/ her duty e.g. one take notes, one lights the candle and hold the spoon over the flame. After the lesson. The lesson did not go according to plan because learners did not go to the internet to search and collect data about energy and Change. To implement the same lesson differently. it would be better to organize computers for learners so that they can use them in class to search information.