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?

Evaluate responses using AI:

OFF

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