Objectives
1. Explain why two materials at the same temperature may
not feel like the same temperature when touched.
2. Explain why porous materials with air spaces are better
insulators than nonporous materials.
22.2 Convection
3. Explain how heat can be transferred quickly through liquids
and gases even though they are poor conductors.
4. Explain the difference between convection and conduction
from an atomic point of view.
22.3 Radiation
5. Explain how heat can be transmitted through empty space.
22.4 Absorption and Radiant Energy
6. Given the color and shininess of two objects predict which
is likely to absorb radiant energy more easily.
22.5 Emission and Radiant Energy
7. Compare the ability of an object to emit radiant energy with
its ability to absorb it.
22.6 Newton's Law of Cooling
8. Relate the temperature difference between an object and
ts surroundings to the rate at which it cools.
22.7 Greenhouse Effect
9. Describe the processes of absorption and emission of radiant
energy from the sun by the earth's atmosphere and surface.
10. Describe the global warming and the earth's greenhouse
effect.
Misconceptions
Note: The following statements are all FALSE!!!
1. Surfaces that freel cooler than others must have a lower
temperature.
2. A blanket is a source of heat energy.
3. Walking barefoot without harm on red hot coals invovles non-
physics considerations.
4. Only hot things radiate energy.
5. The greenhouse effect on the planet Earth is undesirable.
