The branches of pure science include: Life science, Earth science and Physical science. The life science is also known as biology. This studies development, behavior and history of living organisms. From the word bio, everything studied here is about living creatures and their interactions.
Physical science deals with the science of matter and energy. Some sub-branches are physics, chemistry and astronomy.
Earth science is somewhat apart of physical science, but now deals with critical earth problems and such. Some sub-branches are Geology and meteorology.
:D Hope this helps! :D