The mountains would have been caused by plate tectonics and uplift. The snow could have caused ice wedging and the cracking of the mountain rocks. The cracked rocks would fall in rock falls or rock slides.
The snow on top was there because it was cold there. As the mountain got "shorter" it probably wasn't tall (cold at the top)enough to support snow.
As the snow melted, it would cause more erosion on its way to the stream. As long as there is a source of water to a river, it tends to broaden from lateral erosion (making it wider) and downward erosion (making it deeper). Water always tries to reach the lowest point (sea level eventually).
The fact that the river became huge, says that there must have been a lot of rainfall. More rainfall means more erosion.
This type of activity is unlikely to happen in 2 years.
2007-03-21 15:12:03
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answer #1
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answered by evokid 3
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1 - Evolution. Things changing over time.
2 - It evaporated. It went into the air.
3 - Erosion. This can change the size of the river.
2007-03-21 14:13:56
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answer #2
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answered by Mnementh 4
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It will be better for you to research this and answer it on your own. You can go to internet sites such as nationalgeographicforkids.com or search the net using key words such as land forms, changing land forms, and erosion and add in the modifier for kids so that you will get user friendly information. You can also type in questions such as what causes mountains and rivers to change. If you have access to brainpop.com, you might find some useful information.
This needs to be a learning process for you. You will thank me for this when you are older.
2007-03-21 14:22:45
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answer #3
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answered by jewels 1
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Dude... you even ran out of room to ask your own homework questions!! %. up a e book for the subsequent 25 that did not in good condition. those are absurdly straightforward. (a million) sure, i will. (2) Topographic map making use of contour lines. (3) One variable. (4) all the above - use, build on, and redo (be sure). (5) Delta. (6) the quantity of rock and different supplies that a circulate contains. (7) Its erosive power decreases by way of much less power. (8) A circulate that feeds yet another circulate or lake. (9) Gradient. (10) Oxbow lake. (11) Runoff. (12) Watershed. (13) An alluvial fan varieties in water, and a delta varieties on land (it easily *varieties* land). (14) solid drainage. It floods because of the fact it won't be able to drain. (15) Groundwater flowing with the aid of cracks in rocks, for that reason dissolving minerals. (sixteen) all of them deliver groundwater to Earth’s floor. (17) Geysers and warm springs. (18) Chemical weathering. (19) Saturation. (20) Permeable. (21) Groundwater. (22) Zone of saturation. Wasn't this purely coated in #19? (23) all the above; condensation, precipitation, evapotranspiration. (24) Conservation and selection approaches of identifying to purchase clean water. pay interest at school and crack open your textbook. a guy with 0.5 his recommendations bumped off might have spoke back those questions. possibly you're a lost reason because of the fact I purely did those for you?
2016-10-19 07:30:47
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answer #4
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answered by Anonymous
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if you was to google it . i believe it would be called. Natural Erosion to the land. the snow melting becomes the river thus the mountains seemed to be larger. or is it global warming ?
2007-03-21 14:13:55
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answer #5
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answered by astrovan_89 1
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1-?
2- the snow melted and the water from the snow went into the river
3- erosion, it slowly took sediment off the sides causing it to get larger and larger
2007-03-21 14:14:48
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answer #6
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answered by Anonymous
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1- movement of the tectonic plates
2- it melted... partly evaporated into the air and melted into the river
3- global warming
2007-03-21 14:13:11
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answer #7
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answered by *·.·´¯`·.·* jay *·.·´¯`·.·* 4
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Erosion
snow melted - probably due to gloabal warming - IT'S REAL MAN, SPF YOURSELF NOW WHILE YOU HAVE TIME
2007-03-21 14:15:26
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answer #8
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answered by Anonymous
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Why do you want to know so bad, can't you just ask one of your friends at school, or just google it?
2007-03-21 14:12:16
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answer #9
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answered by Anonymous
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