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- 1. It’s Getting Hot In Here! GRADE 7
- 3. PRAYER
- 6. Challenge number 1 "Heat Charades"
- 7. Challenge Number 2 "Heat Transfer Showdown: What's the Reaction?"
- 8. Scenario 1: You are holding an ice cube in your hand. What will happen to the ice cube? a) It will melt due to the heat conducted from your hand. b) It will freeze further and become colder.
- 9. Scenario 2: A pot of water is placed on a stove. What will happen to the water? a) The water will heat up and eventually boil, turning into steam. b) The water will remain cold and unchanged
- 10. Scenario 3: A metal spoon is left in a cup of hot tea. What will happen to the spoon? a) The spoon will become hot due to conduction and transfer heat to the surrounding tea. b) The spoon will cool down the tea and become colder.
- 11. Challenge number 3 “Heat Everywhere”
- 12. HEAT TRANSFER
- 13. Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy.
- 14. Heat is an energy that is transferred from one object to another object due to the difference in their temperature.
- 15. Temperature refers to the relative hotness or coldness of an object.
- 18. Conduction 01. Conduction takes place between objects that are in contact with each other.
- 20. Conduction 01. Materials that conduct heat well are called thermal conductors (good conductors) such as metals like copper, iron, aluminum, steel, silver, brass, lead etc.
- 21. Conduction 01. Materials that conduct heat poorly are known as thermal insulators (poor conductors) some examples are non-metals like wood, rubber, plastic, glass, paper etc.
- 22. 02. Convection is the process in which heat is carried from place to place by the bulk movement of a fluid against its surroundings. Convection
- 24. Radiation 03. Radiation is a method of heat transfer in the absence of matter or through space.
- 26. Challenge number 4 “Heat Transfer with a Candle”
- 29. Challenge number 5 “Heat Transfer Discussion”
- 30. Challenge number 6 “Heat Transfer Bingo”
- 41. Challenge number 7 "Heat Transfer Fact or Fiction"
- 42. Which keeps you cooler during sunny days a black shirt or a white shirt? Why? Extended Assignment: Exploring Heat Transfer in Everyday Life
- 43. CREDITS: This presentation template was created by Slidesgo, including icons by Flaticon, and infographics & images by Freepik Please keep this slide for attribution THANKS! Do you have any questions? youremail@freepik.com +91 620 421 838 yourcompany.com
Editor's Notes
- Thank you, Mary Grace, by following these S.C.I.E.N.C.E. Classroom Rules, we can create a positive and engaging learning environment that promotes scientific inquiry and growth.
- Once again, good afternoon, everyone! I'm excited to have you all here today. Before we dive into the discussion proper, I've prepared seven challenges for you to test your knowledge and problem-solving skills. It is called "Heat Transfer Escape Room" and the team who wins in every challenge will get a chance to roll the dice. The first team to reach the door will win the prize waiting on the other side.
- Instructions: Check your bingo cards if you are Team Tesla or Team Einstein and please proceed to your team. One member from each group will come forward to pick a term or action from the bowl without showing it to the rest of the group. The selected student will then act out the term or action without speaking while the other group members try to guess what it is. Set a time limit (e.g., 1 minute) for each round. Example terms/actions for "Heat Charades": - Melting ice - Holding a hot cup - Shivering in the cold - Sweating on a hot day - Holding a cold drink
- In this challenge, you will answer three exciting scenarios. Get ready to make your choices and show us what you've got!
- Scenario 1: a) It will melt due to the heat conducted from your hand.
- Scenario 2: a) The water will heat up and eventually boil, turning into steam.
- Scenario 3: a) The spoon will become hot due to conduction and transfer heat to the surrounding tea.
- Now let us proceed with a new challenge to be presented through a poem. This poem will give your ideas that will lead you to answer the following activities given in this lesson The three methods of heat transfer stated in the poem are conduction, convection, and radiation. In the poem, 'heat' refers to the energy that keeps our days warm and can be transferred through conduction, convection, and radiation. The poem states that heat flows from a hot object to a cold object, which is a natural process of heat effect. In materials with different temperatures, heat will transfer from the hotter object to the colder object until both objects reach thermal equilibrium. This process occurs through the methods of conduction, convection, or radiation, depending on the specific circumstances. Based on the first 3 challenges, what do you think is our topic for today?
- Today, we will learn about the different methods of heat transfer: conduction, convection, and radiation. After a brief overview, we'll engage in an activity to label the parts associated with each method. Let's get started! Have you ever heard of the term “thermal energy” before? Any object is said to possess thermal energy due to its particles whether at rest or in motion. How is heat related to thermal energy?
- When energy is transformed, such as thermal energy, heat is always produced. It is simply called as ‘energy in transit’.
- Heat transfer is related to change in temperature. An instrument used for measuring and indicating temperature is called ‘thermometer’.
- The energy is transferred through particles that are close or in contact with each other, but it is dominant in solids only.
- These insulators have many important applications. Have you ever wondered why some utensils have handles that are made of wood or plastic? Wood and plastic, being thermal insulators, reduces the heat flowing from the food being cooked to the utensils and finally to the person cooking the food.
- Fluids are materials that can flow, and they include both gases and liquids. The movement of steam or the motion of boiling water in a pot are examples of convection.
- The process of transferring energy through electromagnetic waves is called radiation. When you stay under the sun, your body feels hot because it absorbs energy from the sun. The same thing happens when you put your hand near a lightbulb or stand near a bonfire. The electromagnetic waves carry energy from the fire to your body. Thus, fire and lightbulbs also emit electromagnetic waves.
- The process of transferring energy through electromagnetic waves is called radiation.
- Now let us proceed with a new challenge to be presented through a poem. This poem will give your ideas that will lead you to answer the following activities given in this lesson The three methods of heat transfer stated in the poem are conduction, convection, and radiation. In the poem, 'heat' refers to the energy that keeps our days warm and can be transferred through conduction, convection, and radiation. The poem states that heat flows from a hot object to a cold object, which is a natural process of heat effect. In materials with different temperatures, heat will transfer from the hotter object to the colder object until both objects reach thermal equilibrium. This process occurs through the methods of conduction, convection, or radiation, depending on the specific circumstances. Based on the first 3 challenges, what do you think is our topic for today?
- 1. The metal screen becomes warm or hot when held above the candle flame. 2. The heat from the candle flame reaches the screen through radiation, as energy is transferred in the form of electromagnetic waves. 3. Radiation is involved in this demonstration as heat is transferred from the candle flame to the metal screen through electromagnetic waves without direct contact. 4. Other examples where radiation plays a role in heat transfer include feeling the warmth of the sun, a radiator warming a room, or a person standing near a bonfire
- Answers: 1. The candle flame flickers and moves. 2. The flame does not stay still; it constantly moves. 3. The movement of the flame can be described as flickering or dancing. 4. The flame is moving because of the convection currents created by the heated air rising and cooler air flowing in to replace it. 5. Convection plays a role in the movement of the flame as the heated air rises, creating a convection current that causes the flame to flicker and dance.
- Now, let's discuss what you observed. Raise your hand if you are finish with the experiment and share your observations with the class.
- Alright, we are now in challenge number 6. To reinforce our understanding of the different heat transfer methods, we will engage in an activity where you enumerate the methods: conduction, convection, and radiation. Let's get started!
- Touching a metal spoon that has been sitting in a hot cup of coffee. 1. Conduction: The metal spoon transfers heat from the hot coffee to your hand through direct contact.
- 2. Convection: The warm air rises from the heating vent, creating a convection current that spreads heat throughout the room
- Feeling the warmth of a bonfire from a distance. 3. Radiation: The bonfire emits heat in the form of electromagnetic waves, which you feel as warmth even from a distance.
- Placing a cold can of soda on a tabletop and feeling it warm up as heat transfers from the surroundings. 4. Conduction: Heat from the surroundings transfers to the cold can of soda through direct contact, causing it to warm up.
- Using a hairdryer to dry wet hair by blowing warm air onto it. 5. Convection: The hairdryer blows warm air onto wet hair, speeding up the drying process through the flow of air.
- Feeling the warmth of sunlight on your skin on a sunny day. 6. Radiation: The sun emits heat in the form of radiation, which reaches your skin and warms it up.
- Walking barefoot on hot sand at the beach. 7. Conduction: The hot sand transfers heat to your feet through direct contact as you walk on it.
- A kettle boiling water on the stove, causing bubbles to rise to the surface. 8. Convection: The kettle transfers heat to the water, causing it to heat up and form bubbles that rise to the surface.
- Feeling the heat emitted by a light bulb in a lamp. 9. Radiation: The light bulb emits heat as infrared radiation, which you perceive as warmth when near the lamp.
- Warm air circulating in an oven while baking cookies. 10. Convection: The warm air circulates inside the oven, evenly heating the cookies through convection currents.
- To assess your learning, we may now proceed to… Provide each group with a paper that will contain statements about heat transfer concepts that are either true (fact) or false (fiction). 1. Fact 2. Fact 3. Fiction 4. Fiction 5. Fact 6. Fiction 7. Fiction 8. Fact 9. Fact 10. Fiction