| A | B |
|---|
| Mycologist | Studies fungi |
| Astronomer | Studies the solar system |
| Biomedical Engineer | Designs and builds body parts and devices |
| Biologist | Studies all forms of life |
| Zoologist | Studies animal life |
| Ecologist | Studies animals and their environments |
| Ornithologist | Studies birds |
| Hematologist | Studies blood and its diseases |
| Lepidopterist | Studies butterflies and moths |
| Taxonomist | Studies classification |
| Paleontologist | Studies dinosaurs and fossils |
| Seismologist | Studies earthquakes |
| Chemist | Studies elements, atoms, and molecules |
| Ichthyologist | Studies fish |
| Entomologist | Studies insects |
| Phenologist | Studies life cycles |
| Mammalogist | Studies mammals |
| Microbiologist | Studies microscopic organisms |
| Mineralogist | Studies minerals |
| Physicist | Studies motion, forces, and energy |
| Parasitologist | Studies parasites |
| Botanist | Studies plant life |
| Geophysicist | Studies processes that change and shape the Earth |
| Herpetologist | Studies reptiles and amphibians |
| Geologist | Studies rocks, minerals, and Earth's land forms |
| Audiologist | Studies sound and its properties |
| Meteorologist | Studies the atmosphere and weather |
| Environmentalist | Studies the environment |
| Marine Biologist | Studies life forms found in the ocean |
| Oceanographer | Studies oceans |
| Archeologist | Studies the remains of human life |
| Virologist | Studies viruses |
| Volcanologist | Studies volcanoes |
| Hydrologist | Studies water and the water cycle |
| Cell Biologist | Studies cells and their functions |
