Our world is made up of matter. We study chemistry to acquire knowledge about matter. We perform experiments and learn to Observe, Record and make intelligent Inferences. Studying chemistry gives us training in the scientific method. This knowledge and training will help us to become scientists in the field of chemistry. Such scientists are known as Chemists.
There are many ways in which we can start a course in chemistry, the study of matter, because chemistry is an immense science.
We might begin grandly with the universe, work down to the solar system, to the planet earth, to oxygen in the atmosphere, and then look at the teeming life that depend on it for survival.
We might think that some of these approaches to the study of chemistry would take us first to books, and others, first to the laboratory. But chemists use their books and their laboratories together. It seems reasonable to suppose that high school chemistry students might also find this a good practice. What we need, then, is an approach that will allow our laboratory experiences to emphasize the working methods of chemists while our textbook directs attention to facts and ideas that chemists have already gained by using these methods.
Perhaps we should begin with the familiar oxygen around us. We might begin with ourselves as we take in oxygen for our survival ,but there is some danger of becoming self-centered. Why not begin with the definition of chemistry. Chemistry is the study of the Nature, Composition, Properties and Uses of matter and the changes matter will undergo under different conditions.
By Nature we mean the characteristics of matter, By properties we mean the physical and the chemical appearances of matter. By composition we mean what matter is made up of, By uses we mean what matter is used for, In the case of Oxygen, Living things breathe in for survival, By matter we mean material or anything that have mass and occupy space, By mass we mean the quantity of matter in a body which is its enertia, By space we mean the vacuum occupy by matter. This look is clear enough, But if we try to work out precise and inclusive definitions, we get into trouble.
The field of chemistry may be more complicated than it appears at first glance. But our definition simplifies everything so we can postpone worrying about the exact definition of chemistry.
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