Science is the concerted human effort to understand,or to understand better,the history of the natural world and how the natural world works with observable physical evidence as the basis of that understanding.It is done through observation
of natural phenomena,and/or through experimentation  that tries to simulate natural
processes under controlled conditions.
EX-An ecologist observing the territorial behaviors of blue birds and a geologist examining the distribution of fossils in an out crop are both scientists making observations in order to find patterns in natural phenomena.