If you want to become a palaeontologist, a scientist who studies dinosaurs and fossils, then you will want to take classes in geology and earth sciences.
(you; want; to become a palaeontologist) (you; to become; a palaeontologist) (a scientist; studies; dinosaurs and fossils)
you you a scientist
want to become studies
to become a palaeontologist
a palaeontologist
dinosaurs and fossils