ESS - Life Cycles of Stars

• when gravity caused the center of the cloud to contract

• when gravity caused heavy dust particles to split apart

• by outgassing from the spinning interstellar cloud

• by outgassing from Earth's interior

Tags

NGSS.HS-ESS1-1

After the young Sun formed, the rest of the disk of gas and dust

• became spherical in shape

• formed a central bulge

• became larger in diameter

• eventually formed into planets

Which object forms by the contraction of a large cloud of cases, followed by nuclear fusion of hydrogen into helium?

• a comet

• a planet

• a star

• a moon

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

According to the diagram, in what stage does the sun spend the most time in its life cycle?

• contracting from a gas cloud (nebula)

• as a main sequence star

• moving away from the main sequence and becoming a giant star

• changing from a giant star to a white dwarf star

In what stage is the Sun most luminous according to the chart?

• as a white dwarf

• as a gas cloud (nebula)

• as a main sequence star

• as a giant star

Tags

NGSS.HS-ESS1-1

Every star starts out as a nebula that forms a protostar. What force is responsible for the contraction of the nebula?

Answer explanation

The force is gravity!

How will the sun change as it moves from its Main Sequence stage to its white dwarf stage?

• It will get less luminous as a giant star and then reach peak luminosity as a white dwarf

• It will heat up as it becomes a giant star and cool off when it becomes a white dwarf

• It will cool off and turn back into a cloud of dust and gases

• it will increase in luminosity and become a giant star, and then decrease in luminosity when it becomes a white dwarf

Tags

NGSS.HS-ESS1-1

The sun is a low/medium mass star. What will be its final stage of life?

• a black hole

• a neutron star

• a nebula

• a white dwarf surrounded by a planetary nebula

Tags

NGSS.HS-ESS1-1

Which star in this graph is currently at the Sun's final predicted stage of development?

• 40 Eridani B

• Proxima centauri

• Betelgeuse

• Rigel

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

According to the diagram, the life-cycle path followed by a star is determined by the star's initial

• mass and size

• temperature and origin

• luminosity and color

• luminosity and structure

Tags

NGSS.HS-ESS1-3