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Transcript
CK12- Study of Space
by the EM Spectrum
Student Name: _______________________________________
Date: ___________ Period: _________________
Main Concepts
Facts, descriptions, main points, definitions, picture, or explanations
How do scientists
learn about space?
Electromagnetic
Spectrum
Speed of Light
Light-years
Looking back in
Time
Only write new
information you learn
for these sections
Electromagnetic
Waves
Electromagnetic
Spectrum
Write a one sentence summary of the article that highlights the most important concepts.
Review Questions:
1. Why do astronomers use light-years as a measure of distance?
2. How long would it take a beam of light to travel from New York to LA?
3. How long does it take light to reach Earth from the Sun?
4. How long is a light-year?
5. How long would it take for a beam of light to travel from one side of our galaxy to the other?
6. What is the closest star to earth & how far away is it?
7. In the electromagnetic spectrum, which wavelengths are shorter than visible light?

Which are longer than visible light?

Which are relatively cooler?

Which are relatively hotter?
8. Why does light we see today tell us something about what happened earlier in the history of the
Universe?
CK12- Expansion of the
Universe
Student Name: _______________________________________
Date: ___________ Period: _________________
Main Concepts
Facts, descriptions, main points, definitions, picture, or explanations
What is Doppler
Effect?
Expansion of the
Universe
Red Shift
The Expanding
Universe
Write a one sentence summary of the article that highlights the most important concepts.
Review Questions
1. What cause the sound of a siren to higher pitch as it moves towards you and a lower pitch
as it moves away from you?
2. What causes the dark bands on the spectrum when we view stars through a prism?
3. What can we learn about stars from these absorption lines?
4. Where was helium first discovered?
5. What is redshift?
6. What does it mean that stars & galaxies are red shifted?
7. What type of shift do the majority of objects in space have?
8. What is Hubble’s law?
9. What object does the article use as an analogy to demonstrate Hubble’s Law.
10. What was one flaw in the analogy?