What term refers to the unconsolidated material that covers the surface of the Earth?

What term refers to the unconsolidated material that covers the surface of the Earth?

• A. Soil
• B. Sand
• C. Clay
• D. Sediment

Answer: (A)

The main concept here is that soil is the unconsolidated material that covers the surface of the Earth. Soil is the natural layer formed in place from rock weathering mixed with organic matter, water, and air, and it’s the medium in which most plants grow. That combination makes soil the broad term for the surface cover, not just the individual grain sizes or materials inside it. Sand and clay describe textures or particle sizes found within soil, but they don’t by themselves describe the entire surface-covering medium. Sediment refers to loose material that has been transported and deposited, often away from where it originated, which is a different idea from the continuous surface layer that supports life. So the best term for the surface-covering unconsolidated material is soil.

The main concept here is that soil is the unconsolidated material that covers the surface of the Earth. Soil is the natural layer formed in place from rock weathering mixed with organic matter, water, and air, and it’s the medium in which most plants grow. That combination makes soil the broad term for the surface cover, not just the individual grain sizes or materials inside it.

Sand and clay describe textures or particle sizes found within soil, but they don’t by themselves describe the entire surface-covering medium. Sediment refers to loose material that has been transported and deposited, often away from where it originated, which is a different idea from the continuous surface layer that supports life. So the best term for the surface-covering unconsolidated material is soil.