Sun, Stars And Galaxies

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Pearson 6th Earth Science terms and defintions

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Sun, Stars And Galaxies

  1. 1. Ch. 17- Stars and Galaxies
  2. 2. 1. ____________________- radiant energy transferred by waves; includes x-rays, visible colors, ultraviolet, infrared, microwave and gamma rays electromagnetic spectrum
  3. 5. 2. ____________________- first type to be developed; uses a convex lens; bigger the lens, less accurate refracting telescope
  4. 7. 3. _____________________- concave mirror; reflects to eyepiece and is enlarged reflecting telescope
  5. 9. 4. _______________- dish plus receiver; collects radio waves radio telescope
  6. 11. 5. ________________- telescope above Earth’s atmosphere; provides better images without atmospheric distortions Hubble telescope
  7. 12. 6. _____________- star pictures in the night sky 7. ________ _________- how bright a star appears from Earth 8. ________ _________- the actual brightness of a star constellations apparent brightness absolute brightness
  8. 14. 9. ________- the distance light travels in a year (light speed = 186,000 mps) light year
  9. 15. 10. ________- apparent change in position of an object when you look from different places parallax
  10. 16. 11. ____________- a graph that relates the temperature and absolute brightness of stars H-R diagram
  11. 18. 12. _____________- diagonal area on a H-R diagram that includes 90 % of all stars Main sequence
  12. 19. 13. ______- low-density cloud of gases and dust nebula
  13. 21. "For the eyes of the Lord run throughout the whole earth to show Himself strong in behalf of those who are fully committed to Him."  THIS IS A PICTURE NASA TOOK WITH THE HUBBLE TELESCOPE.. IT IS SIMPLY CALLED "THE EYE OF GOD".
  14. 22. 14. _________- a contracting cloud of gas and dust with enough mass to form a star protostar
  15. 23. 15. ____________-dense core of dying star (so dense that one spoonful on Earth would weigh several tons ) white dwarf
  16. 24. 16. ____- sudden brightness of a star nova
  17. 25. 17. _________- major outburst of energy supernova
  18. 26. 18. ____________- mass left after supernova collapses neutron star
  19. 27. 19. ______- rapidly spinning neutron star; emits energy waves at regular intervals pulsar
  20. 28. 20. __________- matter condensed so tightly that no light can escape black hole
  21. 29. 21. ______________- when two stars orbit each other binary system 22. _______________- a system in which one star periodically blocks the light from another eclipsing binary
  22. 30. 23. __________- loose, disorganized area with only a few thousand stars; _________ _______- large grouping of older stars open cluster globular cluster
  23. 31. 24. _________- great, swollen stars near the end of their existence red giant
  24. 32. 25. ______- large group of stars, gas, dust and satellites held together by gravity galaxy
  25. 33. A. ________- most common type elliptical
  26. 34. B. ______- curved arms from inner parts ________- our galaxy Milky Way spiral
  27. 35. C. __________- all others irregular
  28. 36. Big Bang Theory <ul><li>A theory of how the universe began. </li></ul><ul><li>States that between 13 and 15 billon years ago, all the matter and energy in the known cosmos was crammed into a tiny compact point. This matter and energy exploded and within seconds the fireball ejected matter and energies at the speed of light. This matter began to split apart and developed what we know as the universe today. </li></ul>
  29. 37. Timeline of the Big Bang
  30. 38. 26. _________ _____- the farther away a galaxy is, the faster it is moving Hubble’s law
  31. 39. 27. __________________________- electromagnetic radiation through the cosmos Cosmic background radiation
  32. 40. 28. _____________- a rotating cloud of gas and dust that could have formed our solar system Solar nebula
  33. 41. 29. _____________- outer parts of nebula that became planets planetesimals
  34. 42. 30. __________-matter that does not give off radiation; cannot be seen; inferred by observing its effect on other objects
  35. 43. 31. ___________- mysterious force that seems to be causing the expansion of the universe to accelerate dark energy
  36. 44. 32. Stars are classified by: A. _______________ B. _______________ C. _______________ size brightness temperature
  37. 45. How big are we?
  38. 46. 1. Earth compared to the smaller planets (Venus, Mars, Mercury and Pluto):                                                                                            1. Earth compared to the smaller planets (Venus, Mars, Mercury and Pluto):
  39. 47. 2. Earth compared to the larger planets (Jupiter, Saturn, Uranus and Neptune):
  40. 48. 3. The larger planets compared to the Sun:
  41. 49. 4. Our Sun compared to Sirius, Pollux and Arcturus:
  42. 50. 5. Sirius, Pollux and Arcturus compared to Rigel, Aldebaran, Betelgeuse     and Antares
  43. 51. The End
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