Heat Energy Moves

Overview

Students investigate how heat energy moves from warmer objects to cooler objects through conduction, convection and radiation. They build on everyday experiences of warmth and use observations, labelled scientific diagrams and evidence to explain heat transfer.

Learning intentions

Students will:

• identify conduction, convection and radiation as three methods of heat transfer
• make predictions before an investigation
• work collaboratively to conduct safe, fair investigations
• collect and record observations using labelled scientific diagrams
• explain heat transfer in everyday situations using scientific vocabulary and evidence

Success criteria

• I can identify conduction, convection and radiation.
• I can make and record a prediction before testing.
• I can work safely and fairly with my group.
• I can draw and label what I observe.
• I can explain how heat moves from a warmer object to a cooler object.

Curriculum links

• Students describe the use of energy in familiar contexts, including heat energy in everyday objects.
• Students plan safe and valid investigations by identifying a question, prediction, materials, variables and safe procedures.
• Students ask questions and make predictions using observations.
• Students use and interpret observations and simple data to identify patterns and draw conclusions.

Lesson structure (60 minutes)

1. 0–10 min · Engage and predict. Teacher displays a metal spoon, wooden spoon, insulated lunchbox, thermos, saucepan and picture of the Sun, then opens the hook and familiar objects slides and asks, “How do these objects become warm?” and “Can heat move without touching something?” Students complete a Think–Pair–Share, contribute ideas to an anchor chart titled “What do we already know about heat?” and record: “Which material do you think will transfer heat the fastest? Explain why” in the heat transfer investigation sheet.

2. 10–18 min · Explain the three methods. Teacher uses the conduction, convection and radiation teaching slides to explicitly teach that conduction transfers heat through touching, convection transfers heat by moving fluids such as air or water, and radiation transfers heat across space; use a metal spoon, rising warm air and sunlight as examples. Students act out or sketch an arrow showing heat moving from a warmer object to a cooler object and repeat the key terms with a partner.

3. 18–23 min · Plan safely. Teacher introduces three group stations and models the recording table in the prediction, observation and diagram page; explain that students will observe rather than touch hot materials, keep water and lamps on the teacher’s bench, and change only the feature being investigated where possible. Students form five groups of five, assign roles—reader, equipment manager, observer, recorder and reporter—and write a prediction for each station.

4. 23–43 min · Investigate in rotations. Teacher runs three short rotations, using the station instruction and timer slides: Station A—place one end of a metal spoon and one end of a wooden spoon in separate cups of warm water and observe which handle becomes warm first; Station B—shine a desk lamp on two identical cups or containers, one covered with dark paper and one with light paper, and observe temperature or warmth without touching the bulb; Station C—place food colouring carefully into warm and cool water in clear containers and observe movement, with the teacher adding the colouring if needed. Students rotate approximately every 6–7 minutes, record observations, draw labelled diagrams with arrows and identify the likely transfer method.

5. 43–52 min · Compare evidence. Teacher brings the class together and displays the evidence comparison prompts. Ask, “What changed?”, “What stayed the same?”, “Which observation supports your prediction?” and “Where did heat move from and to?” Students compare results within groups, complete a conclusion in the worksheet and report one claim supported by one observation.

6. 52–60 min · Apply and assess. Teacher presents everyday examples on the application and exit-ticket slides: a metal saucepan handle, warm air rising above a heater, and sunlight warming a person. Students identify the method and explain the direction of heat transfer, then complete the exit ticket in the worksheet: draw and label one example of heat transfer and write one sentence using “warmer”, “cooler” and the correct method.

Resources

• the complete heat transfer slide deck
• the heat transfer investigation sheet
• Metal and wooden spoons
• Three clear cups or containers per station
• Warm and cool water, prepared by the teacher
• Food colouring and droppers
• Desk lamp or low-heat lamp
• Dark and light paper or card
• Thermometer, if available
• Safety glasses, paper towels and timer
• Anchor chart paper, markers and pencils

Assessment

• Listen to predictions and Think–Pair–Share responses to identify misconceptions, particularly the belief that heat is a substance that is “used up”.
• Observe group roles, safe behaviour, fair testing and the accuracy of students’ labelled diagrams and arrows.
• Review investigation conclusions and exit tickets for correct identification of conduction, convection or radiation, evidence from observations and the direction of heat transfer.

Differentiation

• Support students with picture cues, a word bank—heat, warmer, cooler, touch, moving water, radiation—and sentence starters such as “Heat moved from ___ to ___ because ___.”
• Provide a partially completed diagram and allow students to explain observations orally before writing; pair EAL/D students with supportive peers and pre-teach the three method names.
• Use mixed-ability groups with clearly assigned roles, enlarged recording tables and teacher modelling at each station for students requiring additional support.
• Challenge confident students to identify more than one transfer method in an example, explain why insulation slows heat transfer, or compare the reliability of observations from two stations.