The word is chemical.
The rocks cracks on everything
One way rock is eroded is through weathering processes, such as freeze-thaw cycles, where water seeps into cracks, freezes, expands, and eventually breaks the rock apart. Rock can be deposited through sedimentation, where particles transported by water, wind, or ice settle out of the transporting medium and accumulate in layers, eventually forming sedimentary rock.
yes
it breaks certain rocks that are in your way
the water gets into cracks of the rock then over time if the water doesn't evaporate it freezes and expands. When the ice expands the crack gets bigger when the crack gets big enough it splits the entire rock
When a crystal is broken, the way it breaks is called its cleavage. Cleavage is the way the crystal naturally breaks along planes of weakness due to its internal atomic structure.
In one way (ice wedging), water gets into cracks in the rock, then freezes. This force can eventually split the rock crystals. In another (moving ice), a glacier or other large mass of ice moves across the rocks surface. This can scour away loose rock by friction. (It does not require that there be imbedded rocks, but this can also occur, where rocks are pushed together until one breaks.)
In one way (ice wedging), water gets into cracks in the rock, then freezes. This force can eventually split the rock crystals. In another (moving ice), a glacier or other large mass of ice moves across the rocks surface. This can scour away loose rock by friction. (It does not require that there be imbedded rocks, but this can also occur, where rocks are pushed together until one breaks.)
In one way (ice wedging), water gets into cracks in the rock, then freezes. This force can eventually split the rock crystals. In another (moving ice), a glacier or other large mass of ice moves across the rocks surface. This can scour away loose rock by friction. (It does not require that there be imbedded rocks, but this can also occur, where rocks are pushed together until one breaks.)
the way in which the forces are applied to a rock
1. They force water into cracks in the rock. That helps to break it up. It's called hydraulic action. 2. They dissolve soluble material from the rock. This is called solution. 3. They fling sand and pebbles against the rock. These wear it away like sandpaper. This is called abrasion.
Another way that rock breaks down is by freeze-thaw, a weathering process. This is when water seeps into the cracks of rock and then freezes and expands when the temperature goes down. The crack has now become a little bigger, and the next time water enters into the crack, it freezes and does this again. The repeated cycle of water freezing and thawing in the cracks eventually causes the rock to break down into smaller and smaller pieces (over a very long period of time, depending on amount of precipitation and type of rock).