The BIGBANG THEORY

According to the big bang theory, approximately how many years ago did the explosion occur?

• 5 billion years ago

• 20 billion years ago

• 14 billion years ago

• 10 billion years ago

What are the small units formed within the first second after the big bang explosion?

• Electrons

• Protons

• Quarks

• Neutrons

What are isotopes?

• Atoms with different numbers of protons

• Atoms with the same number of protons but different numbers of neutrons

• Atoms with different numbers of electrons

• Atoms with the same number of neutrons but different numbers of protons

What were the approximate composition of the universe a few minutes after the big bang?

• 75% hydrogen, 25% helium, trace amount of lithium

• 60% helium, 40% hydrogen, trace amount of lithium

• 75% helium, 25% hydrogen, trace amount of lithium

• 50% hydrogen, 50% helium, trace amount of lithium

What is the process that gives rise to the formation of light elements like hydrogen, helium, and some traces of lithium?

• Nuclear Fusion

• Big Bang Nucleosynthesis

• Supernova Nucleosynthesis

• Stellar Nucleosynthesis

Who proposed that all matter is made up of very small particles called atoms, which cannot be divided into smaller units?

• Empedocles

• Democritus

• Aristotle

• John Joseph Dalton

Who discovered X-rays?

• Niels Bohr

• Ernest Rutherford

• John Joseph Thomson

• Wilhelm Roentgen

Who discovered electrons?

• Wilhelm Roentgen

• Niels Bohr

• Ernest Rutherford

• John Joseph Thomson

Who discovered protons?

• Wilhelm Roentgen

• Niels Bohr

• Ernest Rutherford

• John Joseph Thomson

Who discovered neutrons?

• Ernest Rutherford

• James Chadwick

• John Joseph Thomson

• Wilhelm Roentgen