Question

what is the science

Answer 1

Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. ☺️☺️

Answer 2

Science is the field of giving rigorous answers, but ironically the definition of "science" is itself not rigorous.

Science is:

Processes for creating models for reliable prediction and control of the natural world;

Models created using those processes; and  

Application of those models.