Geology is probably the best answer, since it includes most of the physical planet. But there are related sub-fields like meteorology, which studies the atmosphere and weather patterns, and oceanography, which studies the oceans.
the study of life
another name for biosphere is an ecosphere; this is where the study of ecology comes in (the study of the ecosphere) the study of livin and dead organisms and how they interact.
geologist
Another name for the Earth's surface is:THe crust
Another name for a meteor that is visible from Earth is Meteoroid.
when it wants to study another planet or come back to earth
paleontologist
World is another name for earth. It satarts with a W.
Another name for Earth rotation is diurnal motion or daily rotation.
Study of matter is Physics, study of energy can be Physics or Thermodynamics
'Bios' is another name for life. For example, Biology means study of life.
Carrell