1. Electromagnetic Energy

2. Something(s) to think about… 1.What is meant by “breaking the sound barrier”? 2.Why is the sky blue? 3.Why can we see light before the Sun rises? And after the Sun sets?

3. All energy travels in waves. Energy is used to describe the amount of work that can be done by a force! (Physics)

4. Types of Waves Sound, Ocean, ElectromagneticSound, Ocean, Electromagnetic Examples of Electromagnetic Energy –X-ray, Microwaves, Visible Light

5. Parts of a Wave Crest Trough Wave Length

6. Wave Frequency The # of wavelengths that pass a point per second. 1 2 3

7. Sun A major source of energy for Earth is radiation from the Sun.A major source of energy for Earth is radiation from the Sun. The Sun produces energy by the process of _______ ______.The Sun produces energy by the process of _______ ______. Energy from the Sun is called ______________ INcoming SOLar radiATION nuclear fusion INSOLATION

8. All energy that can travel through space. Does not need a medium (Solid, Liquid, Gas) All matter gives off electromagnetic Energy including Humans and Desks.

9. I. Absolute Zero Temperature when all particles stop moving.Temperature when all particles stop moving. Therefore, objects warmer than 0 Kelvin must be radiating electromagnetic energy.Therefore, objects warmer than 0 Kelvin must be radiating electromagnetic energy. (0 on Kelvin scale) (0 on Kelvin scale) (-273 º on Celsius Scale) Pg # 13 ESRTPg # 13 ESRT

10. ESRT Pg 14… **Electromagnetic energy is distinguished from one another by __________.** wavelength

11. Gamma XRays IR Short Wavelength High Frequency Visible light is a small part of the Spectrum. But the only energy we can see!!! Visible Light (Roy G Biv) Long Wavelength Low Frequency

13. Sound Barrier Video Clips Please write down your observations and inferences about what is happening during each of the following video clips.Please write down your observations and inferences about what is happening during each of the following video clips.

14. Breaking the Sound Barrier #1 Many jets breaking the sound barrier: http://www.youtube.com/watch?v=BArpqYspIgU

15. Breaking the Sound Barrier #2 http://www.youtube.com/watch?v=SsDEfu8 s1Lw&feature=player_embedded Atlas Rocket breaking the sound barrier:

16. Sound waves travel 768 mph!! Approximately 1 mile in 5 seconds!!!!!

17. What is meant by “breaking the sound barrier”? In the space provided write down what is meant by “breaking the sound barrier”?In the space provided write down what is meant by “breaking the sound barrier”? –Please use the words “speed” and “sound waves” in your answer.

18. What is a wave? Provide an example of a wave that we experience in our everyday lives. What type of energy is being propagated, and through which medium?

19. Something(s) to think about… 1.What is meant by “breaking the sound barrier”? 2.Why is the sky blue? 3.Why can we see light before the Sun rises? And after the Sun sets?

20. Doppler Effect BLUE TOWARD ---------- RED AWAY

21. - Bent energy waves that pass through materials of varying densities causing wave direction to change.

22. 2. Reflection When energy waves bounce off a material.When energy waves bounce off a material.

23. Crater Lake Reflection

24. CRATER LAKE NATIONAL PARK CRATER LAKE NATIONAL PARK

26. 3. Scattered: When Energy bends in various directions.

27. 4. Transmitted Energy thatEnergy that passes through passes through a material. Ex: Windows Energy thatEnergy that passes through passes through a material. Ex: Windows

28. 5. Absorption Energy taken into a material.Energy taken into a material. Ex. A Sponge

29. Surface Color - Dark Colors absorb 1. Surface Color - Dark Colors absorb more energy quickly & quickly re-radiate more energy than light colors. Light Colors Dark Colors EnergySource

30. 2. Surface Texture 2. Surface Texture A.____________ increases absorption & re-radiation. Ex- Wool, Land. B.____________ increases reflection and decrease absorption & re- radiation. Ex- Mirror, Water

31. “Black” “Rough” Why are Highways “Black” & the Road Surface “Rough”?

34. Let’s think… Work in pairs to discuss possible explanations for the following questions:Work in pairs to discuss possible explanations for the following questions: 1. Why is the sky blue? 2. How can we see the Sun before it rises? **Each answer must include one of the following: Refraction, reflection, scatter, transmit, or absorb.

35. Why is the sky blue? http://www.youtube.com/watch?v=u4hw- aXiQmc&safety_mode=true&persist_safet y_mode=1http://www.youtube.com/watch?v=u4hw- aXiQmc&safety_mode=true&persist_safet y_mode=1

36. Why is the sky blue? Molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colors because the blue light has been scattered out and away from the line of sight. Why is the sky blue? Molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colors because the blue light has been scattered out and away from the line of sight.

37. Blue Light is Scattered in the Atmosphere.

38. Refraction enables us to see the Sun below the horizon.

39. Let’s think… Work in pairs to answer the following questions:Work in pairs to answer the following questions: 1. Why is the sky blue? 2. How can we see the Sun before it rises? *Write one to two sentences for each question. **Each answer must include one of the following: Refraction, reflection, scatter, transmit, or absorb.

40. Transmitted Absorbed Reflected What type of energy interactions are occurring and what properties are effecting the energy interactions? 1. 2. 3.

41. Exit Ticket 1.Name one type of electromagnetic energy (USE PAGE 14 ESRT) 2. Electromagnetic energy is distinguished from one another by _____________. 3. Good absorbers of energy are good ___________ of energy.