Final answer:
There is no agreed-upon hierarchy for the natural sciences. The classification varies among experts, with some classifying natural sciences as astronomy, biology, chemistry, earth science, and physics, while others split it into life and physical sciences. Interdisciplinary fields like biophysics and biochemistry combine elements from both categories.
Step-by-step explanation:
There is no consensus on the exact hierarchy of the natural sciences. Some experts classify the natural sciences as astronomy, biology, chemistry, earth science, and physics. Others divide natural sciences into life sciences, including biology, and physical sciences, including astronomy, geology, physics, and chemistry. Additionally, interdisciplinary disciplines like biophysics and biochemistry combine elements from both life and physical sciences.