Student Exploration: Heat Transfer by Conduction
Vocabulary: conduction, convection, insulate, radiation, thermal conductor, thermal energy, thermal insulator
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
Suppose two frying pans have been left on the stove with the burners on. One of the frying pans has a metal handle and the other has a wooden handle.
1. Which handle do you think you could safely touch? ________________________________
2. Why do you think one handle will be cooler than the other? __________________________
Heat, also called thermal energy, can be transmitted through space (radiation), by moving fluids (convection), or through direct contact. This final method, called conduction, is explored in the Heat Transfer by Conduction Gizmo™.
To begin, check that Aluminum is selected. Select the BAR CHART tab and turn on Show numerical values.
1. What is the initial temperature of each beaker? Beaker A 95 Beaker B 5
2. Click Play ([pic]) and observe.
A. What happens to the temperature of Beaker A over time? Beaker a goes down over time. B. What happens to the temperature of Beaker B over time? Beaker b goes up.
3. Why do you think the temperatures of Beaker A and Beaker B changed as they did? Because of conduction.
|Activity A: |Get the Gizmo ready: |[pic] |
| |Click Reset ([pic]). | |
|Measuring heat transfer |Check that Aluminum is selected. | |
Question: How does the temperature difference between two