two rocks. Which one has been weathered by flowing water?
356122
A jagged rock is more likely to be found at the source or parent rock. It probably fell away from the source by weathering during frost/freeze cycles or by the action of falling water. If the source rock is near a waterfall, especially where there is "softer" rock underlying a more resistant one, chances are it broke off from that. Exfoliation is also a possibility.\n\nAlthough it probably started out as the jagged one, the rounded rock is definitely the weathered one. The abrasive action of sand & silt along with the water's movement act to wear down the jagged edges of a rock.\n\nAs you move further downstream, rocks become more well rounded & smaller. The amount of water & sediment load along with the velocity of the water will determine how far a rock moves downstream & to what degree it will erode.\n\nMore sediment & faster stream means that the rock will become more rounded faster.
501423
Igneous rock becomes sedimentary rock by weathering and erosion which makes sediments. The sediments then is deposited and is cemented together to cause sedimentary rock.
281360
its a rock...\n\npencils...
530236
10.= C -LOOK AT A NATURAL SPONGE.  11.= B-LARGE AREA ERODES FASTER AS IT HAS MORE SURFACE. IF GRANITE WEATHERED FAST HALF OUR NATIONAL MONUMENTS WOULD BE GONE. 12.=C. 13.=D. 14.=B. 15.=A.
235598
sand stone, is a type of sediment rock,quartz conglomerate,shelly limestone,oil shale,coal,rock fragments that result from weathering may be transported by glacilar movements wind waves or current,this debris,is deposited at a new location,as a sediment.
762090
With ribbons in the structure (where the pressure changed the rock) just like gneiss\nWith sheets in the structure (also caused by pressure) just like schiste\nWithout ribbons or sheets (where heat changed the rock) just like marble
819968
weathering is where the material is actually broken down where as erosion is what moves it to another place
110099
Not quite what the root of this question is but on it's face, rain erodes rocks. The greatest, and one of the most beautiful, examples is the grand canyon. rain feeds the colorado river which runs thru the canyon carving out of the solid rock over milenia. rain is the most corrosive force on the planet, nothing...nothing can stand against it. eventually water will get thru anything.
147499
you have a cooooooooold rock
326387
Through the processes of weathering, erosion, deposition, sedimentation, cementation, & lithification an igneous rock can become sedimentary.\n\nIgneous rock can be weathered by one of two processes. The first is mechanical weathering. This would include things like the freeze/thaw cycles. Water entering into tiny cracks in rock will freeze causing the crack to expand. There is a larger gap left when the ice melts. Some types of igneous rock will also exfoliate. As they emerge to the surface through uplifting, they will expand (due to less pressure). Sheets of rock will literally peel off from the rock's surface and fall at the base of the rock.\n\nThe other is chemical weathering. This is usually b/c of water's interaction w/ the minerals in the rock. One type of mineral will break down into another more stable one.\n\nThis weathered rock can erode & be transported elsewhere where it is deposited as sediment.\n\nMany layers of sediment may be placed down. Pressure from the layers above cause the water & air in the sediment layers below to be squeezed out.\n\nPressure from above, along w/ dissolved minerals left behind from the water, can cause lithification & cementation to occur.\n\nThese processes take quite some time to occur.
1080408
water and drainage, respectively
183244
Flowing water does.  I don't know about standing water.
56915
Generally, they're formed by freezing and erosion. Essentially what happens is that water gets into the cracks of larger rocks and then freezes and expands, causing pieces to fall off. Sometimes these smaller rocks end up in streams or rivers where they are carried by the current and rolled along the bottom, smoothing them out. over time, they get smaller and smoother becoming what we know as pebbles.
625568
it's a coarse grained light colored igneous rock
346226
they are both in a state of movement...  and both shape or create the landscape as the move.
70354
because it has river banks
550319
salt water and fresh water.