Solve these clues to fill the grid.
- Hard piece of stone
- 2 Across
- Study of the natural world through experiments
- 6 Across
- Clear liquid we drink that falls as rain
- 7 Across
- Matter that has been deposited by some natural process
- 9 Across
- A fertilizer that is derived from animal or vegetable matter
- 11 Across
- The layer of soil between the topsoil and bedrock
- 12 Across
- The layer of soil on the surface
- 13 Across
- Frozen water
- 15 Across
- To remove soil or rock
- 1 Down
- Any substance that can be taken in by a green plant and used in organic synthesis
- 3 Down
- Solid homogeneous inorganic substances occurring in nature having a definite chemical composition
- 4 Down
- Solid unweathered rock lying beneath surface deposits of soil
- 5 Down
- Moving air
- 7 Down
- The usually underground organ that lacks buds or leaves or nodes (plural)
- 8 Down
- Condition in which the earth's surface is worn away by the action of water and wind
- 10 Down
- The part of the earth's surface consisting of humus and disintegrated rock
- 14 Down