Which field of science involves the study of matter and energy interactions, instead of chemical interactions?

The field of science that involves the study of matter and energy interactions is physics. Physics focuses on the fundamental principles that govern the behavior of matter and energy in various forms and their interactions in the universe. This includes understanding forces, motion, energy transfer, thermodynamics, electromagnetism, and the fundamental particles of nature, among other topics.

While chemistry studies the interactions between substances at a molecular or atomic level, focusing primarily on the properties and reactions of matter, it does not typically address the broader principles of energy and matter interactions that physics encompasses. Biology, on the other hand, deals with living organisms and their interactions, while ecology is a subfield of biology that focuses specifically on ecosystems and the relationships between living organisms and their environment. Thus, physics is the appropriate field that addresses the interactions between matter and energy.