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
Science Vocabulary
Science Vocabulary- Chapter 2
| Term | Definition |
|---|---|
| Uniformitarianism | this principle states that the geologic processes that operate today also operated in the past |
| Erosion | is the process of wearing down and carrying away rocks |
| Weathering | is the process that breaks down rock and other substances |
| Mechanical Weathering | the type of weathering in which rock is physically broken into smaller pieces |
| Chemical Weathering | is the process that breaks down rock through chemical changes |
| Abrasion | refers to the wearing away of rock by rock particles carried by water, ice, wind, or gravity |
| Frost Wedging | wedges of ice in rocks widen and deepen cracks |
| Oxidation | iron combines with oxygen in the presence of water in a process called |
| Permeable | means that a material is full of tiny, connected air spaces that allow water to seep through it |
| Soil | is the loose, weathered material on Earth's surface in which plants can grow |
| Bedrock | is the solid layer of rock beneath the soil |
| Humus | is a dark-colored substance that forms as plant and animal remains decay |
| Fertility | is a measure of how well the soil supports plant growth |
| Loam | soil that is made up of about equal parts of clay, sand, and silt |
| pH Scale | measures acidity |
| Soil Horizon | is a layer of soil that differs in color, texture, and composition from the layers above or below it |
| Topsoil | a crumbly, dark brown soil that is a mixture of humus, clay |
| Subsoil | usually consists of clay and other particles of rock, but little humus |
| Decomposers | are the organisms that break the remains or dead organisms into smaller pieces and digest them with chemicals |
| Natural Resource | is anything in the environment that humans use |
| Soil Conservation | is the management of soil to limit its destruction |
| Crop Rotation | a farmer plants different crops in a field each year |
| Contour Plowing | farmers plow their fields along the curves of a slope instead of in straight rows |
| Conservation Plowing | dead weeds and stalks of the previous year's crop are plowed into the ground to help return soil nutrients, retain moisture, and hold soil in place |
Created by:
grace12345
Popular Science sets