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Voyager to the Planets by Necia Apfel Genre: Nonfiction Reading Strategies • Use your strategy cards to remind you the usage for each of the focus strategies: • Clarifying • Asking Questions • Summarizing November 2008 G.Renswick Humphreys Ave ES LAUSD#5 Word Knowledge • umbrella-shaped half-billion blue-green • smart big smarter bigger smartest biggest • black cloud slope • Neptune is a beautiful blue-green color. • Jupiter is the biggest planet visited by Voyager 2. • Thick clouds cover the planet Uranus. November 2008 G.Renswick Humphreys Ave ES LAUSD#5 Selection Vocabulary • space probe • shepherd satellites • retrograde • gravitational attraction November 2008 G.Renswick Humphreys Ave ES LAUSD#5 space probe • The space probe explored the planets. • Context clues • Def. n. spacecraft sent out to explore other planets (pg.157) November 2008 G.Renswick Humphreys Ave ES LAUSD#5 shepherd satellites • The tiny moons on the outer edge of Jupiter’s ring are called shepherd satellites. • Context clues • Def. n.pl. tiny moons that orbit rapidly around a planet (pg.162) November 2008 G.Renswick Humphreys Ave ES LAUSD#5 retrograde • Counterclockwise can be considered retrograde motion. • Context clues • Def. adj. moving backwards or opposite to the usual direction (pg.170) November 2008 G.Renswick Humphreys Ave ES LAUSD#5 gravitational attraction • The gravitational attraction between two very large distant objects can be strong enough to pull them toward each other. • word structure; apposition; context clues • Def. n. a force that pulls two free bodies or objects toward each other (pg.171) November 2008 G.Renswick Humphreys Ave ES LAUSD#5 Background Information • In 1976, Viking I and Viking II actually landed on Mars and sent back information. November 2008 G.Renswick Humphreys Ave ES LAUSD#5 Scientists wanted more.. • ..information about the outer planets, but because of the enormous distance, it would take 30 years or more to reach Neptune. • In 1977, Voyager 2 made a “grand tour” of Jupiter, Saturn, Uranus, and Neptune. November 2008 G.Renswick Humphreys Ave ES LAUSD#5 By observing asteroids.. • ..and comets, scientists discovered a way to use Jupiter’s gravity to boost the space probe in the right direction and use each planet’s gravity in succession to speed the space probe along. November 2008 G.Renswick Humphreys Ave ES LAUSD#5 Graphic Organizers • Using tables or charts to compare and contrast information helps for better understanding. • Venn Diagrams are useful when comparing differences and similarities. November 2008 G.Renswick Humphreys Ave ES LAUSD#5 Make a Chart Information from Voyager 2’s Journey Planet Date Earth August 1977 Jupiter July 1979 Saturn August 1981 Uranus January 1986 Neptune August 1989 November 2008 G.Renswick Humphreys Ave ES LAUSD#5 moons rings Use a Venn Diagram to COMPARE and CONTRAST the different planets Jupiter Earth Many moons November 2008 One moon Both have moons G.Renswick Humphreys Ave ES LAUSD#5 Think About It • Why do scientists on Earth want to gather as much information as possible about the other planets? • Advances in technology have greatly increased our knowledge of the solar system. What will be the next step in exploring the planets? • Would you spend 12 years of your life traveling to and exploring other planets? Why or why not? November 2008 G.Renswick Humphreys Ave ES LAUSD#5 Research • Find out more about the experiments conducted with space probes. • Investigate the challenges of communicating with a space probe from Earth. November 2008 G.Renswick Humphreys Ave ES LAUSD#5