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2007-09-30 11:00:24 · 4 answers · asked by lavender 3 in Science & Mathematics ➔ Geography
physical
2007-09-30 11:03:13 · answer #1 · answered by Anonymous · 1⤊ 0⤋
It's a physical change because of erosion, and the major mechanism for this erosion is now thought to be turbidity currents and underwater landslides. Turbidity currents are dense, sediment-laden currents which flow downslope when an unstable mass of sediment that has been rapidly deposited on the upper slope fails, perhaps triggered by earthquakes.
2007-09-30 11:14:59 · answer #2 · answered by Emmillie 2 · 2⤊ 0⤋
Reason this out...
A chemical change means we are combing two chemicals, adding heat or electricity, and producing a new chemical. (Or breaking chemicals down in similar ways...)
A physical change means we are changing the shape of a thing, but not changing what it is made of.
If you break a rock down until it is just dust, the dust is STILL made of the same stuff the rock had been.
Is this helpful?
2007-09-30 11:05:14 · answer #3 · answered by chocolahoma 7 · 1⤊ 0⤋
Physical. Unless the river is flowing with acid and eating the earth, but that doesn't happen.
2007-09-30 11:04:46 · answer #4 · answered by noee54 2 · 1⤊ 0⤋