Solve these clues to fill the grid.
- Substance used in or made by chemistry
- 4 Across
- Having to do with the body
- 5 Across
- A chemical reaction in which an acid and a base interact with the formation of a salt
- 6 Across
- An arrangement of people or things acting as a unit
- 8 Across
- The formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence
- 10 Across
- Occurring or formed with absorption of heat
- 12 Across
- A process in which a substance reacts with oxygen to give heat and light
- 14 Across
- Any compound containing a ___ atom
- 15 Across
- The metabolic processes whereby certain organisms obtain energy from organic molecules
- 1 Down
- The process of becoming a vapor
- 2 Down
- The process of oxidizing
- 3 Down
- How plants make food from sunlight
- 5 Down
- Occurring or formed with the liberation of heat
- 7 Down
- A chemical substance that is present at the start of a chemical ___
- 9 Down
- The ion NH4 derived from ___
- 11 Down
- To separate into constituent elements or parts
- 13 Down