Science is a subject which has a lot of different subjects connected to it. To understand why there are so many subjects connected to it you must first know what science is. To make a long and complicated definition short, science is the subject which deals with life and the different things you encounter in your life or on a daily basis.
First there is biology. Biology is about being aware of what you are, how your system works and why so and so things happen to you when you don something. It also involves the study of animals and the study of plants, named zoology and botany respectively. Biology is a very interesting subject for many people and you can find many people majoring in it.
The next would be chemistry. This disciple of science deals with the various chemical factors that make different things. There are different elements in and around earth. These can be metals and non-metals, and in some cases something between the two. Chemistry is a very strong subject and is connected to even the beginning of life. It is quite interesting for those who are curious and analytic in nature.
The last one would be physics. This is a part of science that deals with various motions and movements that are connected to a person. For example, say that you threw a ball to somebody. There would be a reason why it went so and so distance, or why it fell down and so on. You can calculate the speed and velocity and so on. Hence physics is a very exciting subject dealing with such things.
Each disciple of science has their own specializations and sub-disciples which are important in their own way. To know more about various things you would have to major in these subjects and their sub-disciples. It is only with proper knowledge and mastering the subjects that you would know correctly about a filed of work or job, else you would just have a brief outline of what the job is about.



