Term | Definition |
Source | is where a river begins |
Riverbanks | are the sides of a river |
Riverbed | is the bottom of the river |
Mouth | is where a river meets a lake, valley, or ocean |
Delta | is a landform at the mouth of a river made by the sand, silt, soil, and rocks deposited by moving water |
Deposition | the process in which water, wind, or ice builds up the earth's surface by dropping sediment in new locations |
Erosion | the process in which gravity, water, ice and wind move sediments from one place to another on the earth's surface |
landform | a part of earth's surface that has a unique shape, is easy to recognize and was created by nature |
model | an object that represents something that is similar to the real thing in many ways but is different in some ways |
weathering | a process by which rocks and sediment break down over time due to exposure to wind, rain or other weather conditions |
Abrasion | the grinding down of rock by another |
Glacier | A large, long-lasting mass of moving ice and snow. Glaciers move down hills or outward in directions as a result of gravity and their immense weight. They retreat (shrink) as a result of melting. |
Erratic | A large moved object moved and dropped by a glacier far from where it originated |
Moraine | Hill like piles of unsorted rocks and deiment dropped by a glacier |
Rock pillar | a tall column of rock |
hoodoo | a strangely shaped rock formation usually scupted by water erosion |
mushroom rocks | rock formations that are narrow on the bottom base and wider at the top |
wind | air that is in motion over the surface of the earth |
drought | extremely dry weather for a long period of time with little or no rain fall. They usually cause water shortages. |
sand dune | a hill of loose sand formed by wind |
soil | a mixture of rock sediment and organic material including living and dead plants, insects and bacteria |
stabilize | to keep from moving |
windbreak | an object or material such as a fence or row of trees that block the path of wind |