Chemistry is important because it helps explain the behavior, appearance, and function of matter. Chemistry is happening every day, all around you. In chemistry, you will examine matter at its very smallest level to learn why it behaves the way it does. Knowing how to make good qualitative and quantitative observations and to recognize chemical and physical properties and changes is a very important part of this study. Classifying substances into groups helps chemists organize matter and make sense of trends that matter shares. In addition, understanding how to separate mixtures into their parts helps chemists look at mixtures as a whole. In your study of chemistry, you will need to know how to use dimensional analysis to convert between units and solve problems.