The Big Bang

A theory that says the universe began as a small point that expanded rapidly about 13.7 billion years ago.

• Big Bang Theory

• Singularity Theory

• Galaxy Theory

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NGSS.HS-ESS1-2

A large grouping of stars, planets, gas, and dust in space held together by gravity.

• Universe

• Galaxy

• Space

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NGSS.MS-ESS1-2

How is a theory different from a guess? Choose the best answer.

• a theory cannot be disproven; a guess can be

• a theory is backed up by hard evidence; a guess is not

• a theory is agreed upon by scientists; a guess is only agreed upon by laypeople

• a theory is usually very old; a guess is usually very new

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NGSS.HS-LS4-1

What do the initial moments after the Big Bang have in common with the universe as it exists now? Choose the best answer.

• all the stars, galaxies, and planets that exist today were formed moments after the Big Bang

• the universe could not sustain life back then, and it cannot sustain life now

• the universe is extremely hot then, and it is still extremely hot now

• the universe began expanding then, and it is still expanding now

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NGSS.HS-ESS1-2

What is one major piece of evidence that the Big Bang theory is correct?

• astronomers have detected leftover radiation from the Big Bang

• everything in the universe has remained the in same location for billions of years

• astronomers have detected that the universe is no longer expanding

• astronomers have detected that the universe is contracting

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NGSS.HS-ESS1-2

What is at the middle of a Heliocentric system?

• Mars

• Moon

• Sun

• Earth

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NGSS.HS-ESS1-4

Who supported the Geocentric system?

• Ptolemy

• Aristotle

• Copernicus

• Galileo

Who proposed the Heliocentric system?

• Copernicus

• Ptolemy

• Aristotle

• Galileo

What does the Geocentric system look like?

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NGSS.HS-ESS1-4

What does the Heliocentric system look like?

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NGSS.HS-ESS1-4