Pressure effects refer to the changes that occur in materials or substances when subjected to varying levels of pressure. These changes can affect physical properties such as density, boiling point, and solubility. For example, increasing pressure can cause gases to compress, while liquids and solids may experience changes in their structural integrity. In nature, pressure effects are significant in geological processes. For instance, the immense pressure found deep within the Earth can lead to the formation of diamonds from carbon. Similarly, in the atmosphere, changes in pressure can influence weather patterns and the behavior of gases in the air.