Prior to the lesson, review the procedure and equipment required for the demonstration.
a cup of hot tea
a wheat bag or hot water bottle
Ask the students to sit in a circle. Encourage them to take note of how warm or cool their hands are feeling. Remind the students that the temperature of their hands is due to the amount of heat energy they have at this particular moment in time.
Pass a warm (not hot) wheat bag or hot water bottle around the circle, allowing each student to hold the object in their hands for a few seconds each. Once the object has been passed on, encourage them to silently note any difference in the temperature of their hands.
After each student has had a turn, facilitate a discussion about the activity. Ask guiding questions, such as:
What difference did you notice in the temperature of your hands after holding the warm object?
Why do you think this happened?
Has the temperature of the warm object changed since the start of the activity?
Encourage the students to think of situations where heat moves from one object to another, or from one place to another. Introduce the concept of heat transference and explain that heat will always move towards an object or place with less heat e.g. warm air from an air conditioner will move toward the coolest places in the room, in order to warm the air up.
Provide the students with a copy of the Moving Heat Worksheet. Read through the instructions for the demonstration as a class. Once the cup of tea has been prepared, use a thermometer to measure the starting temperature of the tea. Show the students where to record this in the table on the worksheet.
Taking turns, allow each student to carefully place their hands above the cup. Encourage them to observe how the air feels, then compare this to the air in the room. Allow the students to note these observations on their worksheet.
Provide the students with a copy of the Heat Transference Worksheet. Encourage them to complete the worksheet independently. As the students are working, be sure to remember to measure the temperature of the cup of tea every ten minutes. The students will need to switch back to the demonstration worksheet to record the temperatures in the table.
Once the students have finished, discuss each example of heat transference on the worksheet. Encourage them to explain how the heat is moving in each image. Allow volunteers to share the example that they have drawn with the class.
Return to the demonstration worksheet. Encourage the students to draw and label a diagram to explain how the heat moved during the activity (the heat moved from the hot tea into the cup and from the hot tea into the air).
Support the students to complete the final question at the bottom of the worksheet. Encourage them to use the data collected throughout the activity to support their ideas about how heat moves.
Encourage more capable students to write a paragraph explaining the movement of heat in the example they have drawn on their worksheet.
Support less confident students by suggesting some examples of heat transference for them to draw on their worksheet.
Suggested Assessment Strategies
used strategic whole class or individual questioning
observed student participation during learning activities