دانلود رایگان پاورپوینت روش همرفت و تابش (انگلیسی)

Conduction, Convection, & Radiation
I. Introduction- What is temperature? What is heat?
2. Liquid Crystal Temperature Sensors
2A. Experiment
2. Discussion
2B. How do Liquid Crystals work?
3. How is energy transferred?
3. Demonstration – Visualizing Radiation
3. Demonstration – Infrared Thermometer
3. Experiment – Visualizing Convection
C. Conduction
Experiment: Visualizing Conduction
Experiment 2. Observing Ice melting
Experiment 3. Ice Melting on 3 Different Materials.
Results
Radiation Extension

2. Liquid Crystal Temperature Sensors
Ask students if they have seen objects that change color with temperature. (mood rings, strip thermometers..)
Discuss the RULES for using the temperature sensors:
The sensor must not be placed in the sun or near a heat source
Always hold the strips using the clear laminated part
Do NOT touch the liquid crystal unless instructed to do so.
Hand out liquid crystal temperature sensors to each pair of students.