stars, galaxies, and the universe -...
TRANSCRIPT
Stars, Galaxies,and the Universe
752 Unit 5: Space Science
Our Sun is one of billions of stars in oneof billions of galaxies in the universe.
Key Concepts
The Sun is our local star.Learn how the Sun producesenergy and about the Sun’slayers and features.
Stars change over theirlife cycles.Learn how stars form and change.
Galaxies have differentsizes and shapes.Learn how galaxies are classified.
The universe is expanding.Learn about the formationand expansion of the universe.
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Chapter 22 online resources:Visualization, Simulation,three Resource Centers,Math Tutorial, Test Practice
What could be presentin the light and darkareas in this galaxy?
Chapter 22: Stars, Galaxies, and the Universe 753
How Can Stars Differ?Look at the sky at nightand find three stars thatdiffer in appearance. Try toidentify the locations ofthese stars, using the starmaps in the Appendix atthe back of this book.
Observe and ThinkHow did the characteristicsof the stars differ?
How Do Galaxies Move Apart?Blow air into a balloon until it is partially inflated. Use afelt-tip pen to make 12 dotson the round end. Then stand in front of a mirrorand observe the dots as youcompletely inflate the balloon.
Observe and Think What caused the dots tomove apart? What might cause galaxies tomove apart in the universe?
Internet Activity: Galaxy ShapesGo to ClassZone.comto explore the differentshapes of galaxies inthe universe.
Observe and ThinkHow do the types ofgalaxies differ from one another?
NSTA scilinks.org
The Sun Code: MDL060
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754 Unit 5: Space Science
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TAKING NOTES
CHOOSE YOUR OWN STRATEGY
Take notes using one ormore of the strategies fromearlier chapters—main ideaweb, combination notes,or main idea and details.Feel free to mix and match the strategies, oruse an entirely differentnote-taking strategy.
VOCABULARYSTRATEGY
Place each vocabularyterm at the center of a description wheel diagram. Write somewords describing it on the spokes.
Review concepts and vocabulary.
CONCEPT REVIEW
• Electromagnetic radiation car-ries information about space.
• Our solar system is in theMilky Way galaxy.
• A galaxy is a group of millionsor billions of stars.
VOCABULARY REVIEW
solar system p. 650
galaxy p. 650
universe p. 650
electromagnetic radiation p. 655
wavelength p. 656
CHAPTER 22
outer layer ofSun’s atmosphere
extends outwardseveral million km CORONA
uneven
shape
very lo
w
density se
en
only
durin
g eclipse
Main Idea Web Combination Notes
Main Idea and Details