1. Biology

   • The study of living organisms and their interactions with the environment.

2. Chemistry

   • The branch of science that deals with the composition, structure, and properties of matter.

3. Physics

   • The study of matter, energy, and the fundamental forces of nature.

4. Geology

   • The study of the Earth's structure, processes, and history.

5. Astronomy

   • The study of celestial objects, space, and the universe.

6. Psychology

   • The scientific study of behavior and mental processes of humans and animals.

7. Sociology

   • The study of human society, social interactions, and social institutions.

8. Anthropology

   • The study of human societies, cultures, and their development.

9. Archeology

   • The study of past human societies and cultures through artifacts and remains.

10. Ecology

    • The study of the relationships between organisms and their environment.

11. Environmental Science

    • The study of the environment and its impact on living organisms.

12. Meteorology

    • The study of the Earth's atmosphere and weather patterns.

13. Botany

    • The study of plants and their biology.

14. Zoology

    • The study of animals and their biology.

15. Microbiology

    • The study of microscopic organisms, such as bacteria and viruses.

16. Genetics

    • The study of genes and heredity.

17. Neuroscience

    • The study of the nervous system and the brain.

18. Biotechnology

    • The use of biological processes for practical applications.

19. Nanotechnology

    • The study and manipulation of matter at the nanoscale.

20. Computer Science

    • The study of computers, algorithms, and information processing.

21. Mathematics

    • The study of numbers, quantity, and patterns.

22. Statistics

    • The collection, analysis, interpretation, and presentation of data.

23. Economics

    • The study of the production, distribution, and consumption of goods and services.

24. Political Science

    • The study of political systems, governments, and political behavior.

25. Linguistics

    • The scientific study of language and its structure.

26. Philosophy

    • The study of fundamental questions about existence, knowledge, values, reason, mind, and language.

27. History

    • The study of past events and their significance.

28. Medicine

    • The science and practice of diagnosing, treating, and preventing diseases.

29. Biochemistry

    • The study of chemical processes within and relating to living organisms.

30. Geography

    • The study of the Earth's landscapes, environments, and spatial relationships.

31. Marine Biology

    • The study of marine organisms and their ecosystems.

32. Entomology

    • The study of insects and their biology.

33. Paleontology

    • The study of prehistoric life through fossils.

34. Astrophysics

    • The branch of physics that deals with the study of the universe and celestial objects.

35. Climatology

    • The study of long-term weather patterns and climates.

36. Oceanography

    • The study of the oceans, including their physical and biological aspects.

37. Seismology

    • The study of earthquakes and seismic waves.

38. Immunology

    • The study of the immune system and its response to pathogens.

39. Genomics

    • The study of an organism's entire genome.

40. Environmental Chemistry

    • The study of chemical processes in the environment.

41. Sociolinguistics

    • The study of the relationship between language and society.

42. Cognitive Psychology

    • The study of mental processes, including perception, memory, and problem-solving.

43. Developmental Psychology

    • The study of human development across the lifespan.

44. Cultural Anthropology

    • The study of human cultures and societies from a comparative and ethnographic perspective.

45. Forensic Science

    • The application of scientific methods to solve legal problems and investigate crimes.

46. Neuropsychology

    • The study of the relationship between the brain and behavior.

47. Astrobiology

    • The study of the origin, evolution, and possibility of life beyond Earth.

48. Biomedical Engineering

    • The application of engineering principles to medicine and biology.

49. Behavioral Economics

    • The study of how psychological factors influence economic decisions.

50. Political Economy

    • The study of the relationship between politics and economics.

Remember to familiarize yourself with these terms and practice using them in different contexts to enhance your understanding and fluency. Utilizing a diverse range of vocabulary will undoubtedly improve your performance in the IELTS exam and academic endeavors. Good luck!