Across
- 4. artificial lakes or stores of water, usually created by building dams across river valleys to hold back the water and create a store for water supply
- 6. separating technique used to separate liquids/ solvent from a solution based on boiling point
- 8. removal of salt from water
- 9. water that is safe to drink
Down
- 1. a permeable or porous rock which stores water.
- 2. change of state from gas to liquid
- 3. a compound made of two hydrogen atoms and one oxygen atom covalently bonded
- 5. change of state from liquid to gas
- 7. contains only one substance (element/compound)