In The Branches of Science, There are: Physical Science, Earth Science and the Life Science.
Under Physical Science, there are: Physics, Chemistry and Astronomy.
Physics is the study of matter and energy.
Chemistry is the science that deals with the composition, properties, reactions, and the structure of matter.
Astronomy is the study of the universe beyond the Earth's atmosphere.
Under Earth Science:
Geology is the science of the origin, history, and structure of the Earth.
Oceanography is the exploration and study of the ocean.
Paleontology is the science of the forms of life that existed in prehistoric or geologic periods.
Meteorology is the science that deals with the atmosphere.
Under Life Science:
Botany is the study of plants.
Zoology is the science that covers animals and animal life.
Genetics is the study of heredity.
Medicine is the science of diagnosing, treating, and preventing illness, disease, and injury.