Big Bang Theory

What does the Big Bang theory explain?

• How stars were formed

• The beginning and expansion of the universe

• The origin of Earth

• Why galaxies stay in one place

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NGSS.HS-ESS1-2

How old do scientists believe the universe is?

• 4.5 billion years

• 13.8 billion years

• 1 million years

• 1 trillion years

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What is meant by the term "expanding universe"?

• Stars are getting larger

• The universe is getting warmer

• The universe is growing in size over time

• Galaxies are shrinking

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NGSS.HS-ESS1-2

What is cosmic microwave background (CMB) radiation?

• Light from the Sun

• Heat left over from the Big Bang

• Sound waves from galaxies

• A form of dark matter

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NGSS.HS-ESS1-2

Why is the discovery of CMB important for the Big Bang theory?

• It shows the universe is expanding.

• It provides evidence of an early, hot stage of the universe.

• It tells scientists about planets in other galaxies.

• It explains the formation of black holes.

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NGSS.HS-ESS1-2

What does redshift tell scientists about galaxies?

• They are coming closer.

• They are moving away from each other.

• They are forming new stars.

• They are made of dark matter.

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Who discovered that galaxies are moving away from us?

• Isaac Newton

• Albert Einstein

• Edwin Hubble

• Nikola Tesla

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What is Hubble’s Law?

• A theory that galaxies are shrinking

• The discovery that galaxies move away at speeds proportional to their distance

• A law about the movement of stars within galaxies

• A rule explaining the temperature of the universe

What two elements were mainly formed right after the Big Bang?

• Hydrogen and Helium

• Carbon and Oxygen

• Nitrogen and Argon

• Iron and Nickel

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NGSS.HS-ESS1-2

Why is the abundance of hydrogen and helium in the universe significant?

• It proves Earth was once a star.

• It supports the idea of the Big Bang as the start of the universe.

• It explains why stars are hot.

• It shows that galaxies are all the same.

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NGSS.HS-ESS1-2