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

2. Electromagnetic Spectrum
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. Wavelength The distance between two crests of a wave Frequency
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. Radio Waves Microwaves
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. Infrared Waves Visible Light
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. Visible Light
Infrared

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

14. Wavelength The distance between two crests of a wave Frequency
Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Choose one verb to write your question:
Define
Describe
Explain
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

15. Radio Waves Microwaves
Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Choose one verb to write your question:
Define
Describe
Explain
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

16. Infrared Waves Visible Light
Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Choose one verb to write your question:
Define
Describe
Explain
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

17. Ultraviolet Rays X-Ray Wave
Topic: Electromagnetic Spectrum Essential Question: How do astronomers use the electromagnetic spectrum to study the universe?
Choose one verb to write your question:
Define
Describe
Explain
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

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.