a pure science as I understand it would be theory. For example, Math (which is a science, though more of a foundation)
And applied math would be to relate the theory to practical application *shock*
For me that practical application is learning Matrices (something that can make little or no sense or use in High School) so I can get my 3D graphics program to move objects around the screen, rotate them, distort them, etc.
So you may wish to either study, for example, the pure science of Gravity to try and investigate further 'why its there', OR you could learn Practical gravity, and discover ways to implement it (eg, slingshot orbits for satellites, etc.)
Though when it comes to discovering anti-gravity I suspect pure science studies will find out first ^.^
Source(s):
<-- college student (C++ Programming, Games development)