1. 15.2 Atmospheric Heating Weather Factors
Sun’s energy travels to Earth as
Electromagnetic waves: thermal heat transfer through a light spectrum.
2) Scattering: Reflections of light in all directions.

2. Radiation
Ever feel the heat of the sun on your face or the heat from standing by a campfire? That is radiation.
3) Radiation: the transfer of energy by electromagnetic waves.

3. Conduction
Have you walked barefoot on the sand at the beach and the sand burned your feet? That is conduction.
4) Conduction: direct contact/ transfer of heat from one substance to another.

4. 5) Convection: The transfer of heat by the movement of fluid or air
5) Convection: The transfer of heat by the movement of fluid or air. Hot air rises, cold air sinks.
Basement is colder than upstairs
Transfer of energy by circulation. ( H Rises to C sinks)
Convection

5. Examples to label: Cooking on the stove-pot on burner ________
Hot air balloon rising _________
Fireplace warming a room __________
Curling iron on hair ___________
Blow dryer on hair ______________
Air from furnace heating the house _____________

6. Bonfire Example for Energy Transfer 3 Ways:
______________ keeps you away.
Smoke and flames are carried away by ______________.
Ground beneath the fire gets hot by ________________.

7. In Summary:
Energy from the sun is the _________________ behind the water cycle, which contributes to create Earth’s weather.
Radiation is transfer by ____________________ waves.
______________________ is energy transfer by direct contact.
Convection is energy transfer by _____________.

8. The Greenhouse Effect and Life on Earth
As you have learned, about ____________________________ that enters Earth’s atmosphere is absorbed by clouds and by the Earth’s surface. This energy is converted into _____________________ that warms the planet.
6) The greenhouse effect: ___________________________________________. Increasing levels of greenhouse gases could cause global warming.

9. How is Earth heated?
Light/heat from the sun _______________ through the atmosphere, hits the Earth where it is absorbed.
This heats the air above it by ____________.
This heat rises up to the ____________________ where it is trapped, cools, sinks and heats at the surface again.-________________.
Think about it: Why does 70 degrees in Spring feel colder than 70 degrees in Fall?

10. Greenhouse Effect Basics
Gases absorb the heat and act as a __________ to keep Earth warm.
Some greenhouse gases: __________, _________, _______ ______________
The gases function like the glass walls and roof of a greenhouse, which allow _______ _______ to enter but prevent ________ _______ from escaping.

11. Runaway Greenhouse Effect: Global Warming?
Many scientists have become concerned about data that show that average global temperatures have increased in the past 100 years.
7) global warming: _______________________ ________________________________________
Some scientists have hypothesized that an ______________________________ in the atmosphere may be the cause of this warming trend. Greenhouse gases absorb thermal energy in the atmosphere = higher temps, not convection

12. Greenhouse Effect
Global Warming
Question: Is Global Warming real? Is it a natural event or man made? Is it natural and people are making it worse?