8th grade science review

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Across
  1. 3. The ability to maintain something
  2. 6. An organism that makes their own food
  3. 12. A group of atoms bonded together
  4. 13. Below 32 degrees
  5. 15. smallest part of a substance
  6. 16. How tightly something is packed together
  7. 18. The process plants use to make their food
  8. 19. Living things in an ecosystem
  9. 21. H20
  10. 22. state of matter where the atoms are the farthest apart
  11. 23. The amount of variety in an ecosystem
  12. 25. A reaction that absorbs heat
  13. 26. Non-living things in an ecosystem
Down
  1. 1. The amount of matter in something
  2. 2. Able to be seen through
  3. 4. the bottom-most point of a wave
  4. 5. Sugar in your blood
  5. 7. Part of the periodic table
  6. 8. the top-most part of a wave
  7. 9. A reaction that releases heat
  8. 10. The depositing of sediments
  9. 11. The speed of something
  10. 14. The force that keeps us on the earth
  11. 17. What humans breathe out (chemical equation)
  12. 20. Not able to be seen through
  13. 24. State of matter where the atoms are closest together