Catalyst: Mouths are quiet . Get your binder and begin the quick review section of your notes.

1. Catalyst: Mouths are quiet. Get your binder and begin the quickreview section of your notes. Raise your hand if you need something.

2. Quick Review 1. Skin covers the outside of the human body. What type of cells makes up skin? Epithelial 2. The brain sends signals to control muscles and receives signals from sensors in the skin. On which type of cells do these signals travel? Neurons 3. Which cells in the body fight off pathogens? Whitebloodcells

3. Quick Review 4. Which flat, disc shaped cells contain hemoglobin for carrying oxygen? Redbloodcells 5. Osteocytes make a hard substance from calcium and phosphate which help support the body. These cells make bone.

4. Earth and Space Lesson 7.12 – The Doppler Effect and Astronomy

5. I can explain the Doppler Effect, how this causes Red Shift, and the implications for astronomy. (4f) 1. If a movingobject is producing waves (electromagneticor sound), the wavelengths of these waves will be changedby the object’s motion.

6. I can explain the Doppler Effect, how this causes Red Shift, and the implications for astronomy. (4f) a. If an object is moving towardthe observer, the waves will be compressed(pushedtogether) and the wavelength will decrease. 1) For a soundwave, this will cause a higherpitchedsound. 2) For EMwaves, this will cause the color to shift toward the blueend of the electromagnetic spectrum. This is called blueshift.

7. I can explain the Doppler Effect, how this causes Red Shift, and the implications for astronomy. (4f) b. If an object is moving awayfrom the observer, the waves will spreadapartand the wavelength will increase. 1) For a soundwave, this will cause a lowerpitchedsound. 2) For EMwaves, this will cause the color to shift toward the redend of the electromagnetic spectrum. This is called redshift.

8. I can explain the Doppler Effect, how this causes Red Shift, and the implications for astronomy. (4f) c. This is called the DopplerEffect. 2. The Doppler Effect gives astronomersmany new tools for studying the universe. a. Scientists can determine if a star or galaxy is moving towardus or awayfrom us and howfastit is doing so by studying the redor blueshiftof the object. b. Scientists have determined that the universe is expandingbecause the oldest stars are exhibiting redshift.

9. Guided Practice Video

12. I-N-D-E-P-E-N-D-E-N-T Do you know what that means?

13. Exit Ticket (5 questions)

14. 1. A star near Earth would usually produce blue light but its light is perceived on Earth as green. Which of these describes what is occurring? • Red shift • Blue shift • No change in light wavelength • It is not possible to determine

15. 2. A star producing green light is moving away from an observer, which of these describes what will occur? • Red shift • Blue shift • No change in light wavelength • It is not possible to determine

16. 3. A plane is producing sound waves. If the plane is moving toward an observer, what will happen to the wavelength of these sound waves? • Stay the same • Increase in wavelength • Decrease in wavelength • It is not possible to determine

17. 4. A celestial body is producing 560 nm electromagnetic waves. If it is detected by an observer to have a wavelength of 600 nm which of these describes the relationship between these objects? • They are moving toward one another. • The distance between them is constant. • They are moving away from one another. • It is not possible to determine.

18. 5. A scientist using an optical telescope measures a yellow light coming from a star. It has the same wavelength as yellow light produced by our Sun. Which of these correctly describes the relationship between these stars? • They are moving toward one another. • The distance between them is constant. • They are moving away from one another. • It is not possible to determine.