Transcript Topic: Electromagnetic Spectrum Essential Question

Topic: Electromagnetic Spectrum
Essential Question: How do astronomers use
the electromagnetic spectrum to study the
universe?
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
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
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
Radio Waves used to look at
the Sun
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
Visible Light
Infrared
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
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
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?
Time to use the left hand column
• You will now write your own questions using
the verbs provided.
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
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
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
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
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
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
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
Now let’s write a summary
Look at each question you
wrote on your own, and
answer each question in a
complete sentence.