Across
- 5. A method used to make sea water potable
- 6. A method used to separate 2 different liquids
- 9. One of the final stages of purification, this stage kills bacteria
- 10. Normally a bad microorganism but can be used in a positive water to help make sewage clean enough to put into rivers
Down
- 1. 1 of 2 substances used to filter fresh water during purification
- 2. A process that separates the large solids from sewage
- 3. The name of the type of substance dissolved in sea water that makes it undrinkable
- 4. The temperature at which liquid water will evaporate into a gas
- 7. 2 of 2 substances used to filter fresh water during purification
- 8. This allows solid particles to settle and drop to the bottom of the tank