Answer:
Space science: Astronaut
Earth science: Geophysicist
Physical science: Chemist or physicist
Life science: Botanist
Step-by-step explanation:
A astronaut is a scientist who travels in space ships to the space and studies the space.
Geophysicists can be described as the scientists who study the physical properties of the Earth.
A chemist is a person who studies chemical reactions and physical sciences.
A botanist is a person who is majorly concerned with the field of plants. They study various aspects of plants.