Theories on the Origin of the Universe

What does the Big Bang Theory suggest about the early universe?

• It was cold and spread out

• It was hot and dense

• It was exactly as it is now

• It didn't exist

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NGSS.HS-ESS1-2

What will happen to the universe according to the Big Bang Theory?

• It will continue expanding forever

• It will collapse back on itself

• It will remain the same size

• It will oscillate between expansion and contraction

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NGSS.HS-ESS1-2

How does the Big Bang Theory explain the abundance of light elements (like hydrogen and helium) in the universe?

• They were created during the initial explosion

• They formed in the first generation of stars

• They were produced by nuclear fusion in the early, hot universe

• They have always existed in their current proportions

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NGSS.HS-ESS1-2

What discovery supports the Big Bang Theory?

• Discovery of cosmic microwave background radiation

• Discovery of dark matter

• Discovery of black holes

• Discovery of exoplanets

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NGSS.HS-ESS1-2

What does the Big Bang Theory suggest about the origin of the universe?

• The universe has always existed in its current state.

• The universe was created from a small, dense, and hot singularity about 15 billion years ago.

• The universe is the result of a collision between two older, separate universes.

• The universe periodically expands and contracts in a cycle.

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NGSS.HS-ESS1-2

Which theory proposes that the universe has always existed and will continue to exist forever in a steady state?

• Big Bang Theory

• Steady State Theory

• Inflation Theory

• Oscillating Universe Theory

Match the following scientists with their contributions to the Steady State Theory.

• Proposed the Big Bang Theory

• Georges Lemaître

• Developed the theory of relativity

• Fred Hoyle

• Developed the Steady State Theory

• Albert Einstein

• Discovered the expansion of the universe

• Edwin Hubble

What role does the concept of "perfect cosmological principle" play in the Steady State Theory?

• It suggests the universe looks the same at all times and places

• It proposes that the universe is perfectly spherical

• It states that the laws of physics change over time

• It implies that the universe is contracting

How do the two theories differ in their explanation of the formation of heavy elements?

• Steady State says they've always existed; Big Bang says they formed in stars

• Steady State says they formed in stars; Big Bang says they've always existed

• Both theories say they formed in stars

• Both theories say they've always existed

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NGSS.HS-ESS1-3

What implication does the Second Law of Thermodynamics have for these theories?

• It supports the Steady State Theory

• It supports the Big Bang Theory

• It contradicts both theories

• It is irrelevant to cosmological theories

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NGSS.HS-ESS1-2

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