Post Universal Expansion

What process increases the thermal energy of atoms in a star and impacts the color of light a star radiates?

• the change of energy into mass during chemical reactions

• the destruction of matter caused by a star’s magnetic field

• the melting of fuels that are located in the core of a star

• the conversion of mass into energy during nuclear fusion

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NGSS.HS-ESS1-1

Which of the following accurately describes the main reaction that generates the Sun's light?

• Light reacts with water to form glucose.

• Oxygen reacts with carbon to form carbon dioxide.

• Iron reacts with oxygen to form iron oxide.

• Hydrogen nuclei fuse, forming helium and releasing energy.

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NGSS.HS-ESS1-1

Which of the following is true about nuclear fusion in stars?

• The process releases great amounts of energy over millions or billions of years.

• The process combines heavier elements to form lighter elements.

• The process occurs near the stars' surfaces, but not inside their cores.

• all of these

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NGSS.HS-ESS1-1

The following image is a deep-field photograph of many distant galaxies taken with an infrared telescope. If all the galaxies shown were composed of the same kinds of stars and nebulae, then the reddest galaxies would...

• be moving away fastest.

• be youngest.

• be moving toward us the fastest.

• contain the most hydrogen.

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NGSS.HS-ESS1-2

Which of the following facts supports the big bang theory model of the Universe?

• Most galaxies appear to be moving away from each other.

• Stars are constantly forming and dying.

• Light moves at a constant speed through empty space.

• Stars are held together by gravity within galaxies

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NGSS.HS-ESS1-2

Which of the following supports the idea that the universe began with a period of rapid expansion and is continuing to expand?

• The redshift indicates that the galaxies are moving away rapidly.

• The redshift indicates that the galaxies are getting closer together.

• The redshift indicates the age of the galaxies.

• The redshift indicates the types of matter in the galaxies.

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NGSS.HS-ESS1-2

Suppose the galaxies in the image are moving in the directions indicated by the arrows. What would have been true at some point in the past?

• All the galaxies were moving with the same velocity.

• The galaxies were closer together.

• All the galaxies were moving in the same direction.

• The galaxies all had the same mass.

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NGSS.HS-ESS1-2

NGSS.HS-ESS1-4

How was it possible for everything in the Universe to have occupied a single point?

• All mass in the Universe was once energy, and energy does not take up space.

• All mass in the Universe was in the form of gases, and gases take up minimal space.

• Only protons and electrons existed in the Universe, and they were pulled together by gravity.

• Only single atoms existed in the Universe, and they were squeezed together by magnetic fields.

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NGSS.HS-ESS1-2

Which of the following best describes the big bang theory?

• Most of the Universe was formed as a result of a massive explosion that occurred after other galaxies had already formed.

• Large explosions occur frequently in the Universe and allow it keep expanding.

• The Universe was formed as a result of a massive explosion sending out material in all directions at a great speed.

• When a large star grew old and ran out of fuel, it resulted in a massive explosion of all types of material in all directions at a great speed.

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NGSS.HS-ESS1-2

If a star or glaxaly is observed from Earth and it is said to be redshifted, that means it is moving ____________ from us.

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NGSS.HS-ESS1-2