Hello student, so geology, earth science are basically same terms with the more or less same definition of study of earth. Only the topics or subtopics different in slight manner.

Geology is study of minerals, mountains, rocks, minerals, erosion, sediments etc. Describing one field of eatch science

it describes and digs into all solid stuff which planet is made of from core and crust till the external part. It can be called as a part of earth science

Earth science is a broad term that describes atmosphere, hydrospgere. Energy flow between them, chemicals etc

everything comes into the picture here, as in oceans, ocean currents, ice etc . Study off all those