1. Lesson 2 Interaction with EM Energy
When you see this, write down notes in packet
Lesson 2 Interaction with EM Energy

8. Incoming Solar Radiation
interacts with the Earth’s atmosphere & surface in three ways
Reflection:
waves bounce off the surface of the material.
2. Refraction:
waves are bent and the direction is changed.
3. Absorbed:
waves are taken into the material.
4. Scattered:
waves bounce off in various directions.

9. B. Reflection vs. Absorption
Color – Dark vs. Light
Texture – Rough vs. Smooth

10. Stay away from the dark side
Light vs. Dark Surfaces
Stay away from the dark side
On a hot summer day when you want to stay cool in the sun, should you wear light or dark color clothing?

11. Dark – absorbs more energy
Light – reflects more energy

12. Smooth vs. Rough Surfaces

13. Rough – more surface area - absorbs
Smooth – less surface area - reflects

14. Good absorbers = Good radiators
Takes in energy well
Gives off energy well

15. FQ:
Put these object in order from best absorber to worst absorber (best reflector)
Snow, Sand, Forests, Water,
Parking lot
Parking lot, Forest, Sand, Water, Snow

16. Energy travels… High Energy Low Energy
C. How is Energy Transferred
interacts with the Earth’s atmosphere & surface in three ways
Energy travels…
High Energy
Low Energy
Energy will stop transferring when…
Energy Becomes Equal
Dynamic Equilibrium

17. Heat Energy Measures how fast molecules are moving
Faster particles = higher temps
Slower particles = lower temps

18. All matter radiates energy, unless it is at absolute zero.

19. Absolute zero = Temperature where all molecules stop moving
Mention that ESRT page 13 has the temperature chart for conversions. This was already gone over in the beginning of the year.

20. Temperature and Energy: How Cold is Cold?

21. Now that’s cold! Deep outer space = 3°K
Coldest temperature in a laboratory =
0.000,000,001
A few billionths of a degree above absolute zero

22. Methods of Energy Transfer
1) Radiation
2) Conduction
3) Convection

23. Ex: Sun’s energy reaching the Earth
Radiation
Transfer of energy through solid, liquid, gas, and vacuum
Ex: Sun’s energy reaching the Earth

25. Conduction Vibrating molecules hit each other transferring energy
*** heat transferred
through
DIRECT CONTACT

26. Conduction

27. Convection Caused by different densities in gases or liquids
Ex: Atmosphere, Ocean, Asthenosphere

28. Water cools down & becomes more dense and sinks
No heat:
Water cools down & becomes more dense and sinks
Heat source:
Water is heated becomes less dense and rises.

29. The plates of the lithosphere and convection in the aesthenosphere

31. Click on the image above and it will redirect you to the internet to watch a video. This is an overview of the lesson.

32. Name that Heat Transfer Method

33. Convection

34. Radiation

35.                                       
Radiation

36. Convection

37.                                        
Conduction

38. Final Question:
What are the three methods of heat transfer in the following picture? 2 1 3