Solve these clues to fill the grid.
- Water falling from clouds
- 2 Across
- A sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals
- 5 Across
- State of matter that fills any space, like air
- 6 Across
- A heavy odorless colorless gas formed during respiration and by the decomposition of organic
- 8 Across
- A state of deterioration in metals caused by oxidation or chemical action
- 1 Down
- A process in which one or more substances are changed into others
- 3 Down
- Undesirable state of the natural environment being contaminated with harmful substances as
- 4 Down
- Any of various water-soluble compounds having a sour taste and capable of turning litmus red
- 7 Down