Down |
2. | chemical cobination of metalic elements with oxygen |
5. | fall of rock form a steep cliff |
6. | mechanical weathering caused by freezing water that seeps in the cracks of rocks |
7. | rideges or elevated regions of high ground that seperate watersheds |
8. | cycle of water movement |
9. | slow downslope flow of wet, muddy topsoil over frozen or clay-ruch subsoil |
12. | a river system is made up of a main stream and all the feeder streams, called ______ |
14. | process that changes the physical form of rocks |
15. | downhill movement of a large block of soil under the influence of gravity |
18. | rock from which the soil was weathered |
20. | layer of weathered rock fragments covering mcuh of the earth's surface |
21. | process by which water falls from clouds to the earth's surface as rain, snow, sleet, and hail |
22. | change in physical form or chemical composition of rock at earth's surface |
25. | the different physical features of earth's surface is also known as.. |
27. | Is the capture of a stream in one watershep by a stream with a higer rate of erosion in another watershed |
28. | the soil is plowed in circular bands that follow the contour, or shape, of the land |
29. | when mesas ultimately erode down to small, narrow-topped formations it is now a ______ |
30. | farmers plant one type of crop one year and a different type the next |
32. | ______ is soil resulting from the deposit of this material |
34. | knobs of hard rock, such as granite |
38. | areas receiving less than 65 cm of rain a year |
39. | high-elevation flat surfaces |
40. | steep landforms of very high elevations |
41. | thick infertile soils produced in tropical climates |
42. | the begining of a stream |
44. | areas receiving more than 65 cm of rain each year |
45. | erosion may disect plateaus into smaller, tablelike areas called ______ |