Unraveling Cosmic Evolution After the Big Bang

Why is chemistry important for understanding history according to John Green?

• Because it explains the formation of stars and elements.

• Because it helps us learn about modern celebrities.

• Because it is more interesting than other subjects.

• Because it helps us understand the behavior of English kings.

What major piece of evidence supports the occurrence of the Big Bang?

• The presence of dark matter.

• The existence of black holes.

• The Cosmic Background Radiation.

• The formation of the Milky Way.

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What caused the first stars to form in the universe?

• The explosion of supernovae.

• The clumping together of hydrogen and helium due to gravity.

• The collision of galaxies.

• The cooling of the universe to absolute zero.

How many stars are estimated to be in the Milky Way galaxy?

• Between 200 and 400 billion.

• Around 1 trillion.

• Approximately 100 million.

• Less than 50 billion.

What is the cosmic horizon?

• The edge of our solar system.

• The limit of the observable universe.

• The boundary of the Milky Way galaxy.

• The distance light travels in one year.

What happens when a star exhausts its hydrogen and helium fuel?

• It swells up and starts fusing heavier elements.

• It immediately explodes.

• It cools down and becomes a planet.

• It becomes a black hole.

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How are elements heavier than iron formed?

• Through the fusion process in small stars.

• During the explosion of supernovae.

• In the core of planets.

• By the collision of black holes.

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What did Carl Sagan mean by 'We are made of star stuff'?

• We are all celebrities in our own right.

• All elements in our bodies were formed in stars.

• Our ancestors were all astronomers.

• Humans are descendants of ancient kings.

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What is the significance of 'rising complexity' in Big History?

• It describes the expansion of the universe.

• It shows how simple elements formed complex structures like stars and life.

• It explains the formation of black holes.

• It details the history of human civilizations.

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Why is understanding chemistry crucial to understanding our ancestry?

• Because it helps us learn about ancient civilizations.

• Because it explains the formation of elements that make up our bodies.

• Because it is more interesting than biology.

• Because it helps us understand modern technology.

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