The answer is - True.
The knowledge of Earth science is essential for the suggested scientific fields because:
- Geologist's main interest of study is the interior of the Earth itself.
- Meteorologist's observation and study of climate is directly connected with the processes on the surface of the Earth and its atmosphere.
- Astronomer's interest of study are the bodies in the space, but to have knowledge and also to be able to make assumptions and comparisons, has to have deep knowledge of Earth science.
- Oceanographer's interest is focused on the oceans and seas whose processes are directly connected with the processes happening inside the Earth.