A Day with the Heat

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 4. Substance used in or made by chemistry (8)
  2. 5. Having to do with the body (8)
  3. 6. A chemical reaction in which an acid and a base interact with the formation of a salt (14)
  4. 8. An arrangement of people or things acting as a unit (9)
  5. 10. The formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence (7)
  6. 12. Occurring or formed with absorption of heat (11)
  7. 14. A process in which a substance reacts with oxygen to give heat and light (10)
  8. 15. Any compound containing a ___ atom (8)

Down

  1. 1. The metabolic processes whereby certain organisms obtain energy from organic molecules (11)
  2. 2. The process of becoming a vapor (11)
  3. 3. The process of oxidizing (9)
  4. 5. How plants make food from sunlight (14)
  5. 7. Occurring or formed with the liberation of heat (10)
  6. 9. A chemical substance that is present at the start of a chemical ___ (8)
  7. 11. The ion NH4 derived from ___ (8)
  8. 13. To separate into constituent elements or parts (9)