5 Written questions
5 Matching questions
- a The breaking down of rocks and other materials on the Earth's surface.
- b a chemical change in which a substance combines with oxygen, as when iron oxidizes, forming rust
- c Mixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil.
- d The solid layer of rock beneath the soil
- e Dark-colored organic material in soil.
5 Multiple choice questions
- process in which sediment is laid down in new locations
- the loose layer of dead plant leaves and stems on the surface of the soil
- Soil organism that breaks down the remains of organisms and digests them.
- The removal of rock particles by wind, water, ice, or gravity
- Rich, fertile soil that is made up of about equal parts of clay, sand, and silt.
5 True/False questions
soil horizon → The layer of soil that differs in color and texture from the layers above or below it.
permeable → characteristic of a material that is full of tiny, connected air spaces that water can seep through
fertility → The removal of rock particles by wind, water, ice, or gravity
subsoil → The layer of soil beneath the topsoil that contains mostly clay and other minerals.
mass movement → earth materials deposited by erosion