Tag: The Nitrogen Cycle

  • Science IX | Natural Resources: Our Environment | Part 3

    Natural Resources: Our Environment | Part 3 Soil Soil is the portion of the earth’s surface consisting of disintegrated rock and decaying organic material. It provides the support for many plants and animals. Thickness of soil on the earth’s surface ranges from a few millimeters to 3-4 meters. Terrestrial plants depend for their nutrients, water…