8th Grade Science

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Across
  1. 1. pH less than 7
  2. 8. Color of hottest stars.
  3. 9. Process plants use to make their own food.
  4. 11. The amount of space that an object takes up.
  5. 12. The daily rise and fall of ocean water levels.
  6. 14. Model of our Solar System where the Sun is at the center.
  7. 17. When substances react to create a brand new substance.
  8. 18. A subatomic particle with a positive charge inside an atom.
  9. 24. Celestial body that orbits a star.
  10. 25. The amount of light energy actually produced by a star.
  11. 27. Variable in an experiment that is tested/changed.
  12. 28. Collection of billions of stars held together by gravity.
  13. 29. Collection of dust & gas that goes on to form a solar system.
  14. 30. How cells turn food to usable energy.
Down
  1. 2. Process of burning fossil fuels - seen in Carbon Cycle.
  2. 3. Multiple trials by the same researcher.
  3. 4. Celestial body that orbits a planet.
  4. 5. Variable in an experiment that is measured as the outcome.
  5. 6. How bright a star appears based on its distance from Earth.
  6. 7. Vertical column of elements that share similar properties.
  7. 10. Other scientists recreate an experiment.
  8. 13. Looping eruption of plasma from the surface of Sun.
  9. 15. When one space object blocks light from another.
  10. 16. Force of attraction between objects that depends on their masses & distance between them.
  11. 19. Mass/Volume
  12. 20. The amount of matter in an object.
  13. 21. The tiny building block that makes up all matter.
  14. 22. Two or more different elements chemically joined together.
  15. 23. Caused by Earth's tilted axis & revolution around the Sun.
  16. 26. A moon shape that is more than half full.
  17. 31. Unit of measurement used for distances within our Solar System.