This picture above shows an example of physical weathering to a boulder. This type of physical weathering was probably caused by water and ice. How this is done is that water seeps into the cracks of the rocks and then freezes. Now, as we all know, ice expands. And ice is just frozen water, right? When ice expands it expands 10% more than when it was just ordinary room temperature water. when it expands from inside the rock a huge pressure is exerted which forces the rocks apart and eventually after this is done many times the rocks is forced to reak from the pressure.
Another type of chemical weathering is by plants. When chemical weathering is performed by plants, it means that the roots of the plant have grown into the rock and forcefully broken it. This acts the same way as ice breaking apart a rock. The roots of the plant(s) grown into the cracks of the rock and after ery many years the roots grow into the rock far enough and split it wide open. Physical weathering is just the simpler way of saying that something is making the rocks smaller over time. What physical weathering does is just break it up into small pieces, and so on, and so on.
Another type of chemical weathering is by plants. When chemical weathering is performed by plants, it means that the roots of the plant have grown into the rock and forcefully broken it. This acts the same way as ice breaking apart a rock. The roots of the plant(s) grown into the cracks of the rock and after ery many years the roots grow into the rock far enough and split it wide open. Physical weathering is just the simpler way of saying that something is making the rocks smaller over time. What physical weathering does is just break it up into small pieces, and so on, and so on.
