Impact Earth Solar System Crossword Puzzle

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Across
  1. 2. a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy.
  2. 4. Obits oval shaped orbits
  3. 6. The fuzzy outer layer of a comet.
  4. 10. A meteoroid that passes through the atmosphere and hits Earth's atmosphere.
  5. 12. effect The trapping of heat by a planet's atmosphere.
  6. 13. the 4th planet from the sun
  7. 15. An oval shape, which may be elongated or nearly circular; the shape of the planet's orbits.
  8. 17. A model of the solar system in which Earth and the other planets revolve around the sun.
  9. 18. zone The outermost layer of the sun's interior.
  10. 20. giants The name often given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune.
  11. 23. A thin disk of small ice and rock particles surrounding a planet
  12. 24. The inner layer of the sun's atmosphere that gives off its visible light.
  13. 25. cloud A spherical region of comets that surrounds the solar system.
  14. 26. A model of the universe in which Earth is at the center of the revolving planets and stars.
  15. 27. belt The region of the solar system, between the orbits of Mars and Jupiter, where many asteroids are found.
  16. 28. The solid inner core of a comet.
  17. 32. belt A doughnut-shaped region that stretches from beyond Neptune's orbit to about 100 times Earth's distance from the sun.
  18. 33. seventh planet from the Sun; is large and gaseous, has a distinct bluish-green color, and rotates on an axis nearly parallel to the plane of its orbit
Down
  1. 1. the largest planet and the 5th from the sun
  2. 3. wind A stream of electrically charged particles that emanate from our solar system.
  3. 5. planet The name often given to the four inner planets: Mercury, Venus, Earth, and Mars.
  4. 6. A loose collection of ice, dust, and a small rocky particles, typically with a long, narrow orbit.
  5. 7. A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
  6. 8. the 3rd planet from the sun
  7. 9. A dark area of gas on the sun's surface that is cooler than surrounding gases.
  8. 10. A chunk of rock or dust in space.
  9. 11. The middle layer of the sun's atmosphere.
  10. 14. the second nearest planet to the sun
  11. 16. the second smallest planet and the farthest known from the sun
  12. 18. The outer layer of the sun's atmosphere.
  13. 19. large, gaseous planet with rings, dark-colored storms, and eight moons; has a distinctive blue-green color
  14. 21. the smallest planet and the nearest to the sun
  15. 22. zone A region of very tightly packed gas in the sun's interior where energy is transferred mainly in the form of light.
  16. 29. The central region of the sun, where nuclear fission takes place.
  17. 30. a giant planet which is surrounded by three planar concentric rings of ice particles
  18. 31. Planets small round bodies that orbit the sun but which have no clears the area around their orbits of other orbiting bodies