The word is chemical.
The rocks cracks on everything
yes
it breaks certain rocks that are in your way
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).
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
fracture
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
Both of these are called igneous intrusions. They form when liquid magma forces its way into cracks in existing rocks and sets. If the resulting band of rock is basically vertical it is called a dyke, and if it is more horizontal it is a sill.
luster