The Universe

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Across
  1. 6. the outer atmosphere of the Sun made up of thin gases and can only be seen during a solar eclipse without telescopes its temperature is 1 - 2,000,000°C
  2. 8. is a scientific activity that makes a particular part of the world easier to understand
  3. 11. the theory that the solar system evolved from a mass of nebular matter
  4. 12. having or relating to the sun as center
  5. 16. the lower level of the solar atmosphere between the photosphere and the corona
  6. 18. any consolidated, large object which orbits a star
  7. 21. of Universal Gravitation states that every object in the universe attracts every other object
  8. 22. - the spinning of the Earth on its axis, day and night (24 hours)
  9. 23. Wind streams of charged particles constantly given off by the Sun
  10. 24. the streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
  11. 25. a ball of ice and dust who orbits around the sun in a long, narrow ellipse
Down
  1. 1. when a meteoroid burns in the atmosphere and hits the ground
  2. 2. a chunk of rock or dust in space that comes from comets or asteroids
  3. 3. the visible surface of the Sun; the upper surface of a convecting layer of gases in the outer portion of the sun whose temperature causes it to radiate light at visible wavelengths; sunspots and faculae are observed in the photosphere
  4. 4. the movement of one object around another, Earth around the sun, year; 365 1/4 days
  5. 5. having or relating to the earth as center
  6. 7. objects revolving around the sun that are too small and too numerous to be considered planets
  7. 9. a theory that says that the universe will stop expanding outward, reverse direction, and pull back on itself to the single point
  8. 10. the measure of the force of gravity on an object
  9. 13. also called the Solar Core, is considered to extend from the center to about 0.2 to 0.25 solar radius. It is the hottest part of the Sun and of the Solar System. It is approx. 15,000,000°C if we convert that to Fahrenheit that would be 27,000,000°F
  10. 14. the force that pulls an apple to the ground, pulls the moon toward Earth, keeps the planets in orbit and attract objects towards each other
  11. 15. the Big Bang is a THEORY about the creation of the UNIVERSE
  12. 17. the galaxy to which Earth and other components of our Solar System belong
  13. 19. Sphere giant spinning dome that the Greeks thought surrounded the Earth
  14. 20. the amount of matter in an object