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Warm-Up # 46 What is a galaxy?

Warm-Up # 46 What is a galaxy? millions or billions of stars, gas and dust, held together by gravitational attraction. WARM-UP #47. What have many irregular shaped galaxies been involved in? COLLISION with Another galaxy. Warm-Up # 48 What evidence is there for the Big Bang Theory???.

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Warm-Up # 46 What is a galaxy?

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  1. Warm-Up # 46 What is a galaxy? millions or billions of stars, gas and dust, held together by gravitational attraction

  2. WARM-UP #47 What have many irregular shaped galaxies been involved in? • COLLISION with Another galaxy

  3. Warm-Up # 48 What evidence is there for the Big Bang Theory??? • Background radiation. This radiation, a type of energy, is believed to be left over from the actual Big Bang. • The expansion of the universe. This means the distance between galaxies is increasing over time.

  4. WARM-UP #49 The first man made object ever sent into space was in 1957 when the Russian satellite named Sputnik was launched.

  5. WARM-UP #50 How old is the universe?

  6. Warm-Up # 50 How old is the universe? ABOUT 14 BILLION YEARS

  7. WARM-UP #51 Why are the spectra of galaxies shifted toward the red end? They show redshift because they are moving away from us.

  8. February 6, 2014 WARM-UP # 52What is ONE piece of evidence that the continents were once all joined together?You know two – fit together like a puzzle and matching fossil evidence.

  9. WARM Up # 53 Who proposed the theory of continental drift? Alfred Wegener proposed the theory of continental drift in 1912. He was a German scientist.

  10. Warm-Up # 54 What is the theory of seafloor spreading and what scientist developed this theory? Scientists found that the youngest rocks are located at the mid-ocean ridges. It was discovered by Henry Hess.

  11. Warm-Up # 56 What are the two theories that when combined make up the theory of plate tectonics? Seafloor spreading (Hess) and continental drift (Wegner)

  12. Warm-Up # 55 Label the three major layers of earth on this diagram:

  13. Warm-Up # 57 • A. What theory of explains why the seafloor has both trenches and mid-ocean ridges? • Evidence that tectonic plates are being created at divergent boundaries is that _______ rocks are found at the mid-ocean ridges and ______________rocks are found further away. • What is the name of the one large supercontinent that existed millions of years ago? Seafloor spreading younger older Pangea

  14. Warm-Up # 58 What is the name of the most famous transform fault (plate boundary) in the world? San Andreas Where is it? California What is a transform fault? A plate boundary where the plates grind past each other (not toward or away from each other).

  15. February 20 Warm-Up # 59 What is hot, melted rock under the surface of the Earth known as??? MAGMA. Hot, melted rock on the surface of Earth is known as LAVA

  16. February 20 Warm-Up # 60 What are climate clues???? Wegner found fossils of the same organism but in very different climates – like a tropical plant in a polar region or a glacial (glacier) deposit in a tropical region.

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