Across
- 3. The breakdown of large rocks into smaller pieces by physical and checmical changes to form soil is called _________.
- 4. A combination of two or more cells.
- 5. Red rose extract turns to green in a __________ solution.
Down
- 1. The brown deposit formed on the surface of iron on exposure to moiset air.
- 2. The underground layers of sediments and rocks that store water in pour spaces are called _________.