Natural Resources – Air, Water and Land — Science STD 6 — Question

1. The soil on the land is formed by a natural process.
2. The abiotic components of soil are supplied through the weathering of the bedrock.
3. Due to heat, cold wind and rain the bedrock breaks down into pieces.
4. Stones, sand and soil are formed from these pieces.
5. Microbes, worms, insects, rodents and roots of trees growing on land help in weathering of rocks.

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This process is slow, continuous and it takes a thousand years to form 2.5 cm thick layer of mature soil.