Exploring Stars and Galaxies

Which of the following best describes the initial stage of star formation?

• A star begins as a white dwarf.

• A star begins as a nebula.

• A star begins as a black hole.

• A star begins as a supernova.

What is the primary force responsible for the collapse of a nebula to form a star?

• Electromagnetic force

• Gravitational force

• Nuclear force

• Frictional force

Tags

NGSS.HS-PS2-4

During which stage of a star's life cycle does nuclear fusion begin/a star is created?

• Red giant stage

• Main sequence stage

• White dwarf stage

• Protostar stage

Tags

NGSS.HS-ESS1-1

Which of the following is a characteristic of elliptical galaxies?

• They have well-defined spiral arms.

• They contain mostly old stars.

• They are rich in gas and dust.

• They have a high rate of star formation.

Compare the star formation rates in spiral and elliptical galaxies. What is a key difference?

• Spiral galaxies have a lower star formation rate than elliptical galaxies.

• Elliptical galaxies have a higher star formation rate than spiral galaxies.

• Spiral galaxies have a higher star formation rate than elliptical galaxies.

• Both have the same star formation rate.

How does the mass of a star affect its life cycle and final stages?

• More massive stars have longer lifespans and end as white dwarfs.

• Less massive stars have shorter lifespans and end as black holes.

• More massive stars have shorter lifespans and can end as black holes or neutron stars.

• Less massive stars have longer lifespans and end as supernovae.

What is the final stage of a massive star's life cycle?

• White dwarf

• Neutron star or black hole

• Red giant

• Main sequence star

A large cloud of gas and dust in interstellar space; the predecessor to stars...

• Constellation
• Black hole
• Nebula
• Galaxy

Which star is the coldest?

• Yellow Star
• Red Star
• Orange Star
• Blue Star

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which category is our Sun located in?

• White Dwarfs
• Supergiants
• Main Sequence
• Giants

Tags

NGSS.HS-ESS1-3