Benchmark 4C The Physical Setting: Processes that Shape the Earth

Benchmark 4C
The Physical Setting: Processes that Shape the Earth
Grades 6-8, page 73

Although weathered rock is the basic component of soil, the composition and texture of soil and its fertility and resistance to erosion are greatly influenced by plant roots and debris, bacteria, fungi, worms, insects, rodents, and other organisms.

NSES Content Standard D
Earth and Space Science: Structure of the Earth system
Grades 5-8, page 160
Soil consists of weathered rocks, decomposed organic material from dead plants, animals, and bacteria. Soils are often found in layers, with each having a different chemical composition and texture.

NSES Content Standard D
Earth and Space Science: Structure of the Earth system
Grades 5-8, page 160
Living organisms have played many roles in the earth system, including affecting the composition of the atmosphere, producing some types of rocks, and contributing to the weathering of rocks.