4.3 HUMAN ACTIVITIES AFFECT SOIL

BIG IDEA: Natural forces break rocks apart and form soil, which supports life.

REMEMBER:

        Mechanical and chemical forces break down rocks.

        Weathering and organic processes form soil.

        Human activities affect soil.

SOIL IS A NECESSARY RESOURCE.

- Soil helps sustain all life on Earth by:

LAND-USE PRACTICES CAN HARM SOIL.

FARMING

CONSTRUCTION AND DEVELOPMENT

MINING

SOIL CAN BE PROTECTED AND CONSERVED.