A scientist is a person who systematically acquires knowledge, conducts research and develops new insights in a particular field or discipline. The tasks and activities of a scientist may vary depending on the field of study, but typically include:

1. Research: Scientists conduct scientific research to answer questions, test hypotheses and develop new theories. This may include both basic and applied research.
2. Data analysis: They collect, analyse and interpret data to test their hypotheses and gain insights. This may involve quantitative (numerical) or qualitative (descriptive) analysis.
3. Experimentation: In many fields of science, scientists design and conduct experiments to test their theories and observe new phenomena.
4. Documentation: Scientists carefully record their results, create reports and documentation to make their research comprehensible.
5. Publication: They publish their results in scientific journals or at conferences to share their knowledge with the scientific community and the public.
6. Collaboration: Scientists often work in teams with other researchers, institutions or companies to investigate complex issues and promote interdisciplinary approaches.
7. Presentations: They present their research results at conferences, workshops or seminars and communicate their findings to colleagues and the public.
8. Teaching: Many scientists also work in teaching and teach at schools, colleges or universities to pass on their knowledge to students.
9. Application of ethics: Scientists must comply with ethical standards and guidelines, especially if their research has an impact on humans, animals or the environment.
10. Further training: They keep up to date with current developments in their field of expertise in order to expand their knowledge and to use new technologies or methods.

Overall, the work of a scientist aims to expand our understanding of natural phenomena, social structures or technical processes and thus contribute to the advancement of knowledge and society.