Chemestry/skin

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 2. A mixture of gases required for breathing (3)
  2. 4. Clear liquid we drink that falls as rain (5)
  3. 6. A substance consisting of two or more substances mixed together (7)
  4. 8. A substance formed by chemical union of two or more elements or ingredients in definite proportion (8)
  5. 9. A process in which a substance reacts with oxygen to give heat and light (10)
  6. 11. The simplest structural unit of an element or compound (8)
  7. 13. An abstract part of something (7)
  8. 14. A homogeneous mixture of two or more substances (8)
  9. 15. Any process in which electrons are added to an atom or ion (9)
  10. 16. A common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas (8)

Down

  1. 1. That which has mass and occupies space (6)
  2. 3. A colloid in which both phases are liquids (8)
  3. 5. The process of oxidizing (9)
  4. 7. A nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic (8)
  5. 10. A mixture in which fine particles are ___ in a fluid where they are supported by buoyancy (10)
  6. 12. Gas in the air that we need to breathe (6)