Question

a scientific theory can be defined as a well - supported and widely accepted explanation of nature. according to this definition, which statement describes a scientific theory? a energy can be neither created nor destroyed. b f = ma; force equals mass times acceleration. c for every action, there is an equal and opposite reaction. d the earths magnetic field is generated by a conducting fluid in its core.

Explanation:

A scientific theory is a well - supported explanation of nature. Options A, B, and C are well - established laws in physics (conservation of energy, Newton's second law, and Newton's third law respectively). Option D is a scientific theory about the origin of Earth's magnetic field, supported by scientific evidence and research.

Answer:

D. The Earth's magnetic field is generated by a conducting fluid in its core.