Ess 1.1

The stable and longest lasting period of a star’s life cycle is called:

• The birth of a star

• Nebula

• Neutron star

• Main Sequence

What fuel do stars use? 

• Oxygen

• Hydrogen

• Carbon

• Iron

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Which is an accurate description of determining a stars life span? 

• the less mass of the star the longer the life span

• stars never die

• all stars shine the same

• stars don't have a life cycle

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What is responsible for bringing the particles together when a star is first born?

• Electrostatic Attraction

• Heat Energy

• Cosmic Radiation

• Gravity

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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 in the same location for billions of years

• Astronomers have discovered that the universe is no longer expanding

• Astronomers have discovered evidence that the universe will soon begin contracting in a "Big Crunch"

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NGSS.HS-ESS1-2

Which description is considered most accurate regarding what actually happened during the Big Bang?

• Two galaxies collided causing an immense explosion as stars crashed into one another

• All of what would become the universe was concentrated in a single small point, or singularity, which rapidly expanded into what is now stars, planets, galaxies, matter, and energy.

• All matter emerged from a massive black hole at the center of the universe.

• Parts of the sun were ripped off by massive internal explosions and were thrown into space where they cooled to become other things, like plants, comets, and other galaxies.

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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 just a few moments after the Big Bang.

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

• The universe was extremely hot then, and it is still extremely hot now.

• The universe began expanding then, and it is still expanding today.

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Most distant galaxies show a red shift. This is considered evidence that the universe is ___.

• getting cooler

• expanding

• condensing into a small point

• swirling around

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How is the "Big Bang" described?

• an explosion

• an expansion

• a contraction

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The universe is expanding!  This means that:

• all of the galaxies are spreading out.

• the universe must have started from a single point.

• the universe is cooling down.

• all of the above.

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NGSS.HS-ESS1-2