Earth in Space Vocab Review

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Across
  1. 4. Half of the disk is illuminated, and the cycle is in the waxing phase.
  2. 6. Half of the disk is illuminated, and the cycle is in the waning phase.
  3. 7. A theory that says the universe began as a small point that expanded rapidly about 13.7 billion years ago.
  4. 8. The phase when the Moon is between the Sun and Earth and none of the illuminated portion is seen from Earth.
  5. 10. Entire disk illuminated.
  6. 12. To spin on an axis or the spinning of Earth on its axis that causes day and night to occur.
  7. 17. The type of energy released by stars consisting of electric and magnetic waves that travel at the speed of light
  8. 21. The galaxy in which the Earth and Sun are located.
  9. 22. The imaginary line through the Earth that extends from the north pole to the south pole and is the center of the Earth's rotation.
  10. 25. Stable stars in the middle developmental phases that plot along a continuous diagonal belt on the H-R Diagram.
  11. 26. Shape of the Moon that is greater than a quarter moon, but not full
  12. 27. A galaxy with a bulge in the center and very distinct long arms winding around the center.
  13. 28. Move in an elliptical path around a center.
  14. 29. A large grouping of stars in space.
  15. 30. The Moon’s repeated pattern of movement and changes in appearance due to its position relative to the Earth and Sun.
Down
  1. 1. The intensity of light from a celestial body that can be used to identify the body's characteristics.
  2. 2. A plot of the surface temperature (color) of stars vs. their luminosity (brightness).
  3. 3. All space and the matter space contains.
  4. 5. The change in wavelength that allows us to determine if an object is moving toward us or away from us.
  5. 9. A grouping of all possible energy levels of electromagnetic radiation from radio waves to gamma rays, including visible light.
  6. 11. A galaxy with a long oval shape, a bright center, no apparent internal structure or spiral arms, and very little dust or gas.
  7. 13. The death of a large star by explosion
  8. 14. Shape of the Moon that is less than a quarter moon.
  9. 15. Growing or getting larger
  10. 16. The remains of a star or other large object that collapsed under its own gravity to form a super-dense object with gravity so strong that light cannot escape its pull.
  11. 18. Large cloud of gas and dust in interstellar space; the location of star formation.
  12. 19. A galaxy with very little symmetry that does not fit into any category.
  13. 20. Weakening or getting smaller.
  14. 23. The four natural divisions of the year based on changes in temperature due to the varied amounts of sunlight (both intensity and number of daylight hours received) caused by the tilt of Earth during revolution.
  15. 24. The different shapes that the Moon seems to have as seen from Earth caused by the Moon’s orbit around Earth.