Updated: Jul 27, 2021
There are many definitions of chemistry, however this one covers it nicely,
"the branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances." (Oxford dictionary)
A map of chemistry could be thought of like this,
(image source: Flickr)
All high school chemistry courses (HSC, IB, GCSE, A-Levels) cover a selection of these topics on the map above, generally going from the left to the right.
Above all, it can be a very exciting journey no matter what topics you study and which path you take!
The relationships between physics chemistry and biology.