5 Written questions
5 Matching questions
- soil horizon
- ice wedging
- a wedges of ice in rocks widen and deepen cracks
- b The layer of soil that differs in color and texture from the layers above or below it.
- c characteristic of a material that is full of tiny, connected air spaces that water can seep through
- d the loose, weathered material on Earth's surface in which plants can grow
- e Mixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil.
5 Multiple choice questions
- The layer of soil beneath the topsoil that contains mostly clay and other minerals.
- the loose layer of dead plant leaves and stems on the surface of the soil
- a chemical change in which a substance combines with oxygen, as when iron oxidizes, forming rust
- Dark-colored organic material in soil.
- any one of several processes by which gravity moves sediment downhill
5 True/False questions
acid rain → rain containing high amounts of chemical pollutants.
deposition → process in which sediment is laid down in new locations
bedrock → The solid layer of rock beneath the soil
decomposer → Soil organism that breaks down the remains of organisms and digests them.
weathering → A measure of how well soil supports plant growth.