UNIVERSE

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Across
  1. 3. of Universal Gravitation - states that every object in the universe attracts every other object
  2. 5. when a meteoroid burns in the atmosphere and hits the ground
  3. 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
  4. 9. - 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 Farhenheit that would be 27,000,000°F
  5. 11. - a chunk of rock or dust in space that comes from comets or asteroids
  6. 12. - the measure of the force of gravity on an object
  7. 14. Crunch Theory- a theory that says that the universe will stop expanding outward, reverse direction, and pull back on itself to the single point
  8. 16. Sphere - giant spinning dome that the Greeks thought surrounded the Earth
  9. 17. - 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
  10. 20. - 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. 21. models - is a scientific activity the aim of which is to make a particular part or feature of the world easier to understand, define, quantify, visualize, or simulate
  12. 22. - having or relating to the sun as center
  13. 23. Hypothesis - the theory that the solar system evolved from a mass of nebular matter
Down
  1. 1. - any consolidated, large object which orbits a star
  2. 2. - the lower level of the solar atmosphere between the photosphere and the corona
  3. 4. - the streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
  4. 7. objects revolving around the sun that are too small and too numerous to be considered planets
  5. 8. - the movement of one object around another, Earth around the sun, year; 365 1/4 days
  6. 9. - a ball of ice and dust who orbits around the sun in a long, narrow ellipse
  7. 10. Bang Theory - the Big Bang is a THEORY about the creation of the UNIVERSE
  8. 13. - having or relating to the earth as center
  9. 15. - the amount of matter in an object
  10. 18. Way - the galaxy to which Earth and other components of our Solar System belong
  11. 19. - the spinning of the Earth on its axis, day and night (24 hours)
  12. 21. Wind - streams of charged particles constantly given off by the Sun