21. Who discovered the laws of thermodynamics?
A) James Clerk Maxwell
B) Michael Faraday
C) Isaac Newton
D) Rudolf Clausius
Answer: D) Rudolf Clausius
22. What is the name of the theory that explains the behavior of subatomic particles?
A) The Theory of Relativity
B) Quantum Mechanics
C) The Big Bang Theory
D) The Theory of Plate Tectonics
Answer: B) Quantum Mechanics
23. Who discovered the principle of electromagnetism?
A) James Clerk Maxwell
B) Michael Faraday
C) Isaac Newton
D) Hermann von Helmholtz
Answer: B) Michael Faraday
24. What is the name of the process by which plants and animals exchange gases with their environment?
A) Respiration
B) Photosynthesis
C) Fermentation
D) Digestion
Answer: A) Respiration
25. Who discovered the laws of planetary motion?
A) Isaac Newton
B) Galileo Galilei
C) Johannes Kepler
D) Albert Einstein
Answer: C) Johannes Kepler
