Contact dermatitis is one of the most common causes of rashes. Contact rashes occur when the skin comes into direct contact with a foreign substance that causes an adverse reaction, leading to a rash. The resulting rash may be itchy, red, or inflamed. Possible causes of contact dermatitis include:
Tear it down Build it up. Destructive Processes are when things happen to the earth that destroy or break down part of it. One example of a destructive process is a river wearing away the rocks and dirt to form a canyon. In the story, an example of a destructive process was the erosion that carried the dirt and the minerals from rocks down into the cave. Weathering is the process that breaks rocks down into pieces called sediment.
Excessive erosion leads to loss of soil, ecosystem damage, and a buildup of sediments in water sources. Building terraces and planting trees can help reduce erosion. Erosion through wind, water, and mass wasting is a very destructive force. Subduction zones are destructive, as those convergent boundaries are where crust is directly taken into the mantle and destroyed. Erosion strips away the topsoil of an area, leaving only clay, rock, and debris in it's path.