1920s

What significant scientific theory was proposed by Edwin Hubble in the 1920s?

• Theory of Relativity

• Quantum Theory

• Expanding Universe Theory

• Plate Tectonics Theory

Which element was discovered by Francis Aston using a mass spectrometer in the 1920s?

• Neon

• Helium

• Argon

• Xenon

What was the primary focus of the Scopes Trial in the 1920s?

• Evolution vs. Creationism

• Quantum Mechanics

• Relativity

• Atomic Theory

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Who won the Nobel Prize in Physics in 1921 for his discovery of the photoelectric effect?

• Albert Einstein

• Niels Bohr

• Max Planck

• Ernest Rutherford

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What was the main scientific contribution of Alexander Fleming in the 1920s?

• Discovery of Penicillin

• Development of the Polio Vaccine

• Invention of the Electron Microscope

• Discovery of Insulin

Which scientific instrument, crucial for atomic research, was developed in the 1920s?

• Electron Microscope

• Mass Spectrometer

• Cyclotron

• Geiger Counter

What was the primary scientific achievement of Werner Heisenberg in the 1920s?

• Uncertainty Principle

• Theory of Relativity

• Quantum Electrodynamics

• Wave-Particle Duality

Which scientific concept did Niels Bohr contribute to in the 1920s?

• Bohr Model of the Atom

• Theory of Relativity

• Quantum Field Theory

• General Theory of Relativity

What was the main focus of the scientific work of Louis de Broglie in the 1920s?

• Wave-Particle Duality

• Theory of Relativity

• Quantum Entanglement

• Photoelectric Effect

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Which scientific discovery in the 1920s led to the development of quantum mechanics?

• Wave-Particle Duality

• Theory of Relativity

• Photoelectric Effect

• Uncertainty Principle

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