How has our knowledge about atoms changed over time? This is the earliest description of atoms. It is important not only to know the contemporary knowledge about atoms but also about what we used to know of them before. We see that our knowledge of atoms has changed tremendously and based on that we can easily predict that the same will happen in the future.
This module has a description of our earliest knowledge of atoms as being similar to that of a billiard ball. It explains how we slowely changed from that thinking to the modern concept. It also has a quiz and there are several links to outside reference materials on the topic. It is surprising to learn that humas has such a little knowledge about atoms in the earlier times yet they knew that they exist.