4.7

4.7

Tell the person next to you...
1. What is the most common heat transfer mechanism in solids? - copper
2. What is the most common heat transfer mechanism in liquids and gases? - convection 3. What is the only heat transfer mechanism in a vacuum? - Radiation
4. Why can't conduction happen in a vacuum? - Because there are no particles 5. What happens to the space between the molecules in a gas when you heat it? - They expand 6. What happens to the density of a gas when you heat it? - It decreases 7. Why can't convection happen in a solid? Because the particles are linked together. Instead it conducts the heat

4.6 (RESEND)

4.6
· 4.6 recall that energy transfer may take place by conduction, convection and radiation

Task 1
· Try the animation: particle model - conduction
· Extension: what is the limitation of this animation?

Task 2
· Try the quiz on the Cooking animation
· Extension: what's the mistake in the description of convection?

Particle model - conduction.swf Download this file

Cooking using Conduction, Convection and Radiation - interactive animation.swf Download this file