Chemistry of Life

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 1. Clear liquid we drink that falls as rain (5)
  2. 4. A fertilizer that is derived from animal or vegetable matter (7)
  3. 5. A substance formed by chemical union of two or more elements or ingredients in definite proportion (8)
  4. 8. An essential structural component of living cells and source of energy for animals (plural) (13)
  5. 10. An elementary particle with negative charge (plural) (9)
  6. 12. A substance consisting of two or more substances mixed together (7)
  7. 14. An elementary particle with 0 charge and mass about equal to a proton (plural) (8)
  8. 15. A particle that is electrically charged (3)
  9. 16. The smallest component of an element having the chemical properties of the element (plural) (5)

Down

  1. 2. Any of several complex proteins that are produced by cells and act as catalysts in specific (6)
  2. 3. A homogeneous mixture of two or more substances (8)
  3. 6. That which has mass and occupies space (6)
  4. 7. A mixture in which fine particles are ___ in a fluid where they are supported by buoyancy (10)
  5. 9. An abstract part of something (7)
  6. 11. An oily organic compound insoluble in water but soluble in organic solvents (plural) (6)
  7. 13. A stable particle with positive charge equal to the negative charge of an electron (plural) (7)