1. A TMOSPHERIC H EATING Heat transfer

2. R ADIATION : S OLAR E NERGY T RANSFERS BY W AVES Radiation: is energy that is transferred as electromagnetic waves, such as visible light and infrared waves. (Energy transferred from the sun in waves) The Sun heats up the Earth through radiation Examples include visible light, radio waves, sunlight,and radiant heat. Can be in the form of particles or waves.

3. E XAMPLES OF RADIATION ( HEAT )

4. R ADIATION Direct transfer of energy without heating the space in between Fireplace Microwave Radiator Energy from the Sun to the Earth

5. C ONVECTION The transfer of heat by a liquid or gas (such as air). Convection causes most of the heating of the troposphere (atmosphere)

6. E XAMPLES OF CONVECTION

7. C ONVECTION C URRENT Hot, less dense air rises and cold more dense air sinks. Air near the ground is heated by the sun (radiation) The molecules gain energy and move faster As they bump into each other they move further apart and become less dense The less dense air then rises due to the warm temperature Cooler, denser air sinks This causes a constant movement of heat through the troposphere.

8. C ONVECTION Transfer of a heat through a fluid (gas or liquid) Oven Boiling Water Air rising (hot) and falling (cold

9. C ONDUCTION : S OLAR E NERGY T RANSFERS BY C ONTACT The direct transfer of heat from one substance to another substance that is touching it. Conduction works better in certain substances, like metals

10. E XAMPLES OF CONDUCTION

11. C ONDUCTION Transfer of heat from one substance to another that is touching Hair Straightener Heating Pad Electric Blanket Energy from molecules that touch Earth’s surface

12. A LL 3 TYPES WORK TOGETHER :