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Quick Write— Answer using the TAG IT A 3 strategy in your science notebook. Section 3 Pp. 14-20

Quick Write— Answer using the TAG IT A 3 strategy in your science notebook. Section 3 Pp. 14-20. Why are different stars/constellations visible in the sky depending on the season?. Warm Up—Answer using the TAG IT A 3 strategy in your science notebook. Section 3 Pp. 14-20.

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Quick Write— Answer using the TAG IT A 3 strategy in your science notebook. Section 3 Pp. 14-20

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  1. Quick Write—Answer using the TAG IT A 3 strategy in your science notebook.Section 3 Pp. 14-20 • Why are different stars/constellations visible in the sky depending on the season?

  2. Warm Up—Answer using the TAG IT A 3 strategy in your science notebook.Section 3 Pp. 14-20 • Why are different stars/constellations visible in the sky depending on the season? • The Earth travels around the sun, different areas of the universe are visible.

  3. Section 3 Mapping the Stars PP. 14-20

  4. Constellations • Constellations are sections of the sky with recognizable star patterns. • Helped people long ago keep track of time and used to navigate. • Location in the sky changes season to season. • Different constellations visible in each Hemisphere.

  5. Big Dipper

  6. HorizonThe line where the sky and the Earth appear to meet.

  7. Zenith • The point in the sky directly above an observer on Earth.

  8. Altitude • An object’s altitude is the angle between the object and the horizon.

  9. The Path of the Stars Across the Sky • As the Earth spins on its axis, stars and planets appear to move. • Circumpolar stars are stars that can be seen at all times of the night.

  10. Light Year • The distance light travels in one year. • A beam of light can travel 300,000 km/sec • 1 light year= 9.47 x 10∧12km • Farthest object we can observe is 10 billion light years away. • *Refer to figure 7---page 19 (Scale in the Universe)

  11. Light • As an object moves away from an observer at a high speed, the light from the object appears redder. ---redshift • As the object moves toward the observer, the light from the object appears blue.---blueshift • Evidence of redshift and blueshift indicate that the universe is expanding. • Evidence of redshift indicates that the universe is expanding.

  12. Red and Blue Shift

  13. Quick write • What would an indication of blueshift indicate to scientists?

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