Chemistry Review

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Across
  1. 4. a substance that can make air, soil, or water harmful to organisms and structures
  2. 5. air quality index
  3. 9. the measure of the average speed of particles of matter
  4. 11. I have 6 protons
  5. 17. most of the earth's atmosphere is made of this
  6. 18. the amount of "stuff" something contains
  7. 19. a type of particulate matter
  8. 20. the chemical symbol for a toxic liquid element used in thermometers
  9. 21. matter that has a definite volume but not a definite shape
  10. 23. also known as burning
  11. 24. containing substances that cause harm to people, plants, animals, and structures.
  12. 25. when sulfur dioxide mixes with water you get _____ acid.
Down
  1. 1. fuel and oxygen are both _____ in a combustion readilutepm parts per million
  2. 2. a negatively charged sub-atomic particle
  3. 3. anything that has volume and has mass
  4. 5. the basic building block of matter
  5. 6. a sub-atomic particle with a neutral charge
  6. 7. a fossil fuel made from ancient forests
  7. 8. the simplest type of substance made of identical atoms
  8. 10. to make something less concentrated
  9. 12. necessary for "fixing" nitrogen into plants
  10. 13. any mixture that has a uniform composition of substances (evenly mixed)
  11. 14. matter that has no definite shape or volume
  12. 15. a pure substance made of two ore more elements
  13. 16. matter with a definite shape that volume
  14. 22. a measure of how much space something takes up
  15. 24. a positively charged sub-atomic particle that tells you the identify of an element