Matter and the Environment

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Across
  1. 2. the central core of an atom
  2. 9. a compound that lacks carbon to carbon bonds
  3. 11. macromolecules that direct protein production
  4. 18. large molecules that are required for life, which include proteins, nucleic acids, carbohydrates, and lipids
  5. 20. a particle outside of the nucleus with a negative charge
  6. 21. summarizes information on the elements
  7. 22. a positively charged atom
  8. 24. a substance with a pH value between 7 and 14
  9. 25. a basic unit of matter
  10. 27. a positively charged particle
  11. 29. a chemical substance with a given set of properties that cannot be broken down into substances with other properties
  12. 30. another word for alkaline
  13. 31. a bond between two oppositely charged ions
  14. 32. bond a bond in which the oxygen atom of a water molecule is weakly attracted to one or two hydrogen atoms of another water molecule
  15. 33. a substance with a pH value between 0 and 7
  16. 34. a bond in which atoms have an unequal pull on electrons
  17. 35. organic compounds in a chain of repeated molecules; also play an important role in the building blocks of life
  18. 37. all material in the universe that has mass and occupies space
  19. 38. structure of nucleic acid that carries an individual’s set of genes
Down
  1. 1. a mixture in which all of the ingredients are evenly distributed
  2. 3. a chemically diverse group of macromolecules that are grouped together because they do not dissolve in water
  3. 4. a molecule that serve as chemical messengers within an organism
  4. 5. the parts of DNA that order the production of certain proteins
  5. 6. the defined number of protons each element has
  6. 7. a hydrocarbon that can evaporate from spilled or incompletely burned oil or gasoline and can mix with water (PAH)
  7. 8. full name for RNA; copies of DNA segments responsible for making proteins
  8. 10. a polymer that consists of carbon, hydrogen, and oxygen; two examples are glucose and cellulose
  9. 12. full name for DNA; carries hereditary information and is responsible for passing on traits from parent to offspring
  10. 13. a substance composed of atoms of two or more different elements
  11. 14. a molecule that promote certain chemical reactions
  12. 15. property of water in which water molecules stick to each other (think of water spiders gliding on water)
  13. 16. an organic compound containing only hydrogen and carbon
  14. 17. the reduction of chemical pollution using organisms that consume or neutralize the polluting substances
  15. 19. a particle with no charge (neutral charge)
  16. 23. the macromolecule that helps tissues and provides support, or store energy, transport substances, or work within the immune system
  17. 26. a combination of two or more atoms of the same type or of different types joined by covalent bonds
  18. 28. what happens when atoms combine due to attraction
  19. 35. the acidity or alkalinity of a solution is described by this
  20. 36. a bond between two atoms in which the atoms share electrons