The main purpose of scientific theories and hypotheses is to provide frameworks for understanding natural phenomena and guiding research. A hypothesis is an educated guess that can be tested through experimentation, while a theory is a well-established explanation supported by substantial evidence. Together, they help scientists make predictions, design experiments, and interpret results. Ultimately, these scientific constructs foster a deeper comprehension of the world, allowing for advancements in knowledge and the development of technology, thereby enhancing our quality of life.