31.3 - Galaxies and the Milky Way(10pts.)

Explain why the claim is incorrect.

• The sun is not a main sequence star.

• The sun has no mass.

• Stars do not fuse nuclei of atoms.

• The sun will not explode and leave behind a black hole.

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HS-ESS1-1

What is the the life cycle of a star with the same mass as the Sun?

• Main Sequence -> Giant -> White Dwarf

• Main Sequence -> White Dwarf -> Super Giant

• Giant-> Super Giant -> Black Hole

• Supernova -> Black Hole -> Neutron Star

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HS-ESS1-1

An astronomer examining a distant galaxy detects the atomic spectrum for gold.

Which of the following are they most likely studying?

• Black Hole

• Supergiant

• Supernova

• Planetary Nebula

Answer explanation

The astronomer is most likely studying a Supernova as the detection of the atomic spectrum for gold indicates the presence of heavy elements produced during a supernova explosion.

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HS-ESS1-1

Tag where Sagittarius A-star is located.

What will the Sun become when it reaches the end of its life span?

• red giant

• black hole

• white dwarf

• neutron star

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HS-ESS1-1

Nuclear reactions within the core of a stable star provide pressure that prevents it from collapsing under its own weight.

Which statement correctly describes the interaction of forces on a stable star?

• Pressure pushing outward from the star is in balance with gravity pushing inward.

• Pressure pushing inward toward the star is in balance with gravity pushing outward

• The level of pressure from within the star is less than the force of gravity pressing on the star.

• The level of pressure from within the star is greater than the force of gravity pressing on the star.

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HS-ESS1-1

How does the life cycle of a very massive star differ from the life cycle of the Sun?

• A very massive star will never run out of Hydrogen because it is regenerative.

• A very massive star will will burn through its hydrogen faster and can end up as a black hole.

• A very massive star will become a white dwarf, then a red giant.

• A very massive star is the same as the sun, the sun is the largest thing in the solar system.

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HS-ESS1-1

Do you think the star was formed early in the universe??

• The star was probably formed later in the lifespan of the universe because all elements were present in the early universe.

• The star was probably formed later in the lifespan of the universe because it contains heavier elements such as oxygen and sulfur.

• The star was probably formed early in the life of the universe because it is made up of hydrogen and helium.

• The star was probably formed early in the lifespan of the universe because it is made up of all the elements.

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HS-ESS1-1

What conclusion can be drawn about the elements that were present at the beginning of the universe?

• The only elements that were in the early universe were stars and galaxies because they are the only elements that make up stars that were formed early in the universe.

• The only elements that were in the early universe were Carbon and Neon because they are the only elements that make up stars that were formed early in the universe.

• The only elements that were in the early universe were Oxygen and Iron because they are the only elements that make up stars that were formed early in the universe.

• The only elements that were in the early universe were Hydrogen and Helium because they are the only elements that make up stars that were formed early in the universe.

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HS-ESS1-1

What type of galaxy is the Milky Way?

• Irregular

• Spiral

• Elliptical

• Candy bar

Answer explanation

The Milky Way is a Spiral galaxy, characterized by its spiral arms and a central bulge. It is not an Irregular, Elliptical, or Candy bar galaxy.

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HS-ESS1-3

HS-ESS1-1