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
6 Topic 9
Topic 9 Earth's Surface Systems
| Term | Definition |
|---|---|
| uniformitarianism | the geologic principle that the same geologic processes that operate today operated in the past to change Earth's surface |
| erosion | the process by which water, ice, wind, or gravity moves weathered particles of rock and soil |
| mechanical weathering | the type of weathering in which rock is physically broken into smaller pieces |
| chemical weathering | the process that breaks down rock through chemical changes |
| soil | the loose, weathered material on Earth's surface in which plant can grow |
| humus | dark-colored organic material in soil |
| deposition | process in which sediment is laid down in new locations |
| mass movement | any one of several processes by which gravity moves sediment downhill |
| deflation | the process by which wind removes surface materials |
| sand dune | a deposit of wind-blown sand |
| loess | a wind-formed deposit made of fine particles of clay and silt |
| runoff | water that flows over the ground surface rather than soaking into the ground |
| stream | a channel through which water is continually flowing downhill |
| tributary | a stream or river that flows into a larger river |
| flood plain | the flat, wide area of land along a river |
| delta | a landform made of sediment that is deposited where a river flows into an ocean or lake |
| alluvial fan | a wide, sloping deposit of sediment formed where a stream leaves a mountain range |
| groundwater | water that fills the cracks and spaces in underground soil and rock layers |
| glacier | any large mass of ice that moves slowly over land |
| continental glacier | a glacier that covers much of a continent or large island |
| ice age | time is Earth's history during which glaciers covered large parts of the surface |
| valley glacier | a long, narrow glacier that forms when snow and ice build up in a mountain valley |
| plucking | the process by which a glacier picks up rocks as it flows over the land |
| till | the sediments deposited directly by a glacier |
| longshore drift | the movement of water and sediment down a beach caused by waves coming in to shore at an angle |
Created by:
muellershauna
Popular Science sets