Bio Chapter 2

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Across
  1. 3. an ________ can decrease the activity of an enzyme by binding to the enzyme’s activation site
  2. 12. water molecules have areas of _____ and negative charge, and are called polar
  3. 16. the tendency of energy to spread out
  4. 18. your body is made of 65% of this
  5. 19. since we can't make our own food (ex: photosynthesis) we need this type of energy from our food
  6. 20. Brownian motion causes matter to spread out, a process called _______
  7. 21. these don't dissolve in water because they are nonpolar
  8. 23. this energy is needed to get a reaction started
  9. 24. the process through which a smell can travel throughout a room
  10. 25. enzymes in your body are useful because they ____ the activation energy required to start the process
  11. 26. The ______ are on the left side of a chemical equation
  12. 30. the smallest individual part of an element
  13. 31. this attaches to the enzyme in the activation site
  14. 32. this type of reaction is "cold"
  15. 33. a substance that changes the rate of a chemical reaction
  16. 36. the attraction of water molecules for other substances
Down
  1. 1. in a solution there is more of this
  2. 2. this kind of bonding occurs when a hydrogen atom, already bonded to a highly electronegative atom (like oxygen, nitrogen, or fluorine), is attracted to another nearby electronegative atom with a lone pair of electrons
  3. 4. This is a substance that produces OH– ions in a solution
  4. 5. ionic compounds are held together by ____ charges
  5. 6. The _____ are on the right side of a chemical equation
  6. 7. the smallest part of a covalent compound
  7. 8. a naturally occurring catalyst, usually a protein
  8. 9. this type of reaction is "hot"
  9. 10. _______ compounds form when atoms share electrons
  10. 11. The ______ of water molecules for each other is called cohesion
  11. 13. Brownian motion is caused by the__________ between particles
  12. 14. ________ is study of matter and the changes it experiences
  13. 15. a pure substance made of 2 or more chemically combined elements
  14. 17. Matter is the _____ stuff that makes up the universe
  15. 22. in a solution there is less of this
  16. 27. the amount of solute in the solvent
  17. 28. a substance that produces H+ ions in a solution
  18. 29. Of all the elements, ______ is the most significant to life
  19. 34. when you take a temperature you are measuring the ____ of the particles in that substance
  20. 35. a pure substance made of only one kind of atom