1. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe?

2. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Electromagnetic Spectrum The range of radiant (light) energy arranged in order of wavelength and frequency

3. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Wavelength –The distance between two crests of a wave Frequency –A count of the number of crests that pass a point in a given amount of time –High frequency = high energy

5. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Radio Waves – Astronomers use them to study what stars are made of, their structure and movement Microwaves – Used to cook your food – Used to learn about galaxies – Used to learn about stars that are behind clouds of dust

6. Radio Waves used to look at the Sun

7. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Infrared Waves – Used by astronomers to map dust between stars Visible Light – Rainbows show the different wavelengths of light – We are able to see colors of stars which gives us a clue about their temperature – Helps us understand the Red Shift and Blue Shift

8. Infrared Visible Light

9. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Ultraviolet Rays – Used to learn about the structure and how galaxies change X-Ray Wave – Used to detect black holes because black holes give off X-Ray waves

10. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Gamma Rays – Given off from any explosion like a supernova or a black hole – Astronomers use them to gain knowledge of how our universe began and how fast it is expanding

11. Now take some time… Take 2 minutes to go over your notes and highlight or underline the main ideas that answer the essential question, you should not highlight everything: Essential Question: How do astronomers use the electromagnetic spectrum to study the universe?

12. Time to use the left hand column You will now write your own questions using the verbs provided.

13. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Electromagnetic Spectrum The range of radiant (light) energy arranged in order of wavelength and frequency Choose one verb to write your question: Define Describe Explain

14. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Wavelength –The distance between two crests of a wave Frequency –A count of the number of crests that pass a point in a given amount of time –High frequency = high energy Choose one verb to write your question: Define Describe Explain

15. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Radio Waves – Astronomers use them to study what stars are made of, their structure and movement Microwaves – Used to cook your food – Used to learn about galaxies – Used to learn about stars that are behind clouds of dust Choose one verb to write your question: Define Describe Explain

16. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Infrared Waves – Used by astronomers to map dust between stars Visible Light – Rainbows show the different wavelengths of light – We are able to see colors of stars which gives us a clue about their temperature – Helps us understand the Red Shift and Blue Shift Choose one verb to write your question: Define Describe Explain

17. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Ultraviolet Rays – Used to learn about the structure and how galaxies change X-Ray Wave – Used to detect black holes because black holes give off X-Ray waves Choose one verb to write your question: Define Describe Explain

18. Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe? Gamma Rays – Given off from any explosion like a supernova or a black hole – Astronomers use them to gain knowledge of how our universe began and how fast it is expanding Choose one verb to write your question: Define Describe Explain

19. Now let’s write a summary Look at each question you wrote on your own, and answer each question in a complete sentence.