A. a study of fields such as biology, chemistry and physics.
B. a body of knowledge, such as principles, laws and theories, which explain the world around us (matter, energy and life).
C. exploring the unknown and discovering new things about our world and universe and how they work.
D. carrying out experiments to solve problems of interest about the world around us.
E. inventing or designing things (for example, artificial hearts, computers, space vehicles).
F. finding and using knowledge to make this world a better place to live in (for example, curing diseases, solving pollution and improving agriculture).
G. an organization of people(called scientists) who have ideas and techniques for discovering new knowledge.