Biology Chapter 2

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Across
  1. 3. substance that changes rate of chemical reaction but isn't used up
  2. 7. substance present before a chemical reaction
  3. 8. smallest particle of a covalently bonded compound
  4. 9. drives the physical and chemical processes necessary for life
  5. 11. slows a chemical reaction by binding to enzymes
  6. 12. attraction between particles of different substances
  7. 16. change that does not change the identity of a substance
  8. 17. organic compound that is a source of energy and structure
  9. 20. molecules with uneven electrical charge
  10. 21. covalently bonded compound containing carbon
  11. 22. pure substance made of only one kind of atom
  12. 23. substance formed during a chemical reaction
  13. 24. organic compound that provides building blocks for proteins
  14. 26. pure substance made or two or more elements chemically combined
  15. 27. substance that can produce hydrogen ions (H+)in solution
Down
  1. 1. organic compound that provides building blocks for DNA and RNA
  2. 2. change that results in new substances being formed
  3. 4. average speed of the particles in a substance
  4. 5. physical stuff that makes up the universe
  5. 6. naturally occurring catalyst, usually a protein, that assists a chemical reaction
  6. 10. tendency of energy to disperse or spread out
  7. 13. particles in solution evenly distributed by Brownian motion
  8. 14. nonpolar organic compound providing energy storage and cell membrane
  9. 15. substance that can produce hydroxide ions (OH-) in solution
  10. 18. organic compound that includes sugars, starch and cellulose
  11. 19. attraction between molecules in polar substances
  12. 24. smallest particle of an element
  13. 25. attraction between atoms by transferring or sharing electrons