Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
ch.2weathering&soil
| Term | Definition |
|---|---|
| uniformitarianism | the geological principle that the same geological processes that operate today operated in the past to change Earth's surface |
| erosian | the process by which water, ice, wind, or gravity moves weathered particles of rock and soil |
| weathering | the chemical and physical processes that break down rock and other substances |
| mechanical weathering | the type of weathering in which rock is physically broken into smaller peices |
| chemical weathering | the process that breaks down rock through chemical changes |
| abrasion | the grinding away of rock by other rock particles carried in water, ice or wind |
| frost wedging | processes that splits rock open when water seeps into cracks then freezes and expans |
| oxidation | a chemical changes in which a substance combines with oxygen, as when iron dioxides, forming rust |
| permeable | characteristic of a material that contains connected air spaces or pores that water can seep through easily |
| soil | the loose weathered material on Earth's surface in which plants can grow |
| bedrock | rock that makes up earths crust; also the soild rock layer beneath the soil |
| humus | dark colored organic material in soil |
| fertility | a measure of ho well soil supports plant |
| loam | rich fertile soil that is made up of about equal parts of clay sand and silt |
| pH scale | a range of values used to indicate hoe acidic or basic a substance is; expresses the concentration of hydrogen ions in a solution |
| soil horizon | a layer of soil that doffers in color and texture from the layers above and below it |
| topsoil | the crumbly topmost layer of soil made up of clay and other minerals and humus (nutrients and decaying plant and animal matter) |
| subsoil | the layer of soil below topsoil that has less plant and animal matter tan topsoil and contains mostly clay and other minerals |
| decomposer | an organism that gets energy by breaking down wastes and and dead organisms and returns raw materials to the soil and matter |
| natural resource | anything naturally occurring in the environment that humans use |
| soil conservation | the management of soil to limits its destruction |
| crop rotation | the planting of different crops in a field each year to maintain the soils fertility |
| contour plowing | plowing fields along the curves of a slope to prevent soil loss |
| conservation plowing | soil conservation method in which weeds and dead stalks from the previous years crop are plowed into the ground |
Created by:
emiles043