Matter is all around us. In fact, our body is also made up of matter. It exists either in a form of solid, liquid or gas. We can understand the physical world around us by studying about matter. Knowing the process involved when one state of matter change to another helps us to understand the natural phenomena that happens in daily life. Understanding the water cycle however help us to know where we get our water and studying the uses of water emphasizes the importance of keeping our water resources clean. These educate us to be individually responsible for the usage of water and to avoid polluting the water.