Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. To what point do objects cool down to?
   • Hot objects always cool down until they reach the same temperature as their surroundings.
2. How do insulators work?
   • Insulators reduce the speed (rate of) Energy transfer.
3. What is a better insulator - air or plastic?
   • A gas is a better insulator than a solid.
4. Why is air a better insulator than plastic?
   • A gas is a better insulator than a solid because gas Particles are further apart than in a solid. Therefore the collision of Particles are less frequent.
5. What are the best insulators?
   • Vacuums are the best insulators.
6. Why are vacuums the best insulators?
   • Vacuums are the best insulators because there are no Particles to collide in a vacuum.
7. Why do humans wear clothes to keep warm?
   • Layers of clothes or fur, trap air so that the Particles can not convect away, while the air still reduces conduction by reducing collisions.