Bio – diversity represents the presence of various biological species found in a region on the earth’s surface. Weathering has a significant impact on bio – diversity. Bio – diversity is completely affected by vegetation. Rocks and minerals are trans – located by weathering and new surfaces are formed. This helps in the penetration of moisture and air in the surface by chemical process. Through this, the humus, carbonic and acidic materials enter into the soil, by which bio – diversity is affected. In this way, it can be said that weathering is responsible for bio – diversity on the earth’s surface.