Star Formation and Distance

What is the primary element that stars fuse early in their life cycle?

• Helium

• Dust

• Hydrogen

• Iron

Tags

NGSS.HS-ESS1-1

Which of the following would be classified as the beginning of star formation?

• red dwarf

• main sequence

• protostar

• white dwarf

At what point did our sun form? (What had to happen?)

• When Helium split into Hydrogen.

• When Nuclear Fusion of hydrogen into helium began

• When Nuclear Fission of hydrogen into helium began.

• When Nuclear Fusion of helium into hydrogen began

Tags

NGSS.HS-ESS1-1

What is the first stage of the life cycle of a star for all stars?

• nebula

• protostar

• main-sequence

• red giant

This is a young star that glows as gravity brings it together

• Nebula

• Protostar

• Main-sequence star

• Red giant

What is the biggest difference between a protostar and a main sequence star?

• Protostars are more massive than main sequence stars

• Protostars do not engage in nuclear fusion

• Stars spend far longer in the protostar phase than their main sequence

• Protostars are hotter than main sequence stars

Which trigger could start the gravitational contraction of a molecular cloud?

• a faster rotation of the molecular cloud

• ​an intense magnetic field

• ​the collision of molecular clouds

• ​a nearby spectral type G star

When a large gas cloud starts to collapse in a free-fall due to gravity, the cloud will ____.

• increase in temperature

• ​decrease in temperature

• ​rotate slower

• ​remain at the same temperature

What is the primary force responsible for the initial collapse of a molecular cloud in star formation?

• Electromagnetic force

• Nuclear force

• Gravitational force

• Weak force

Tags

NGSS.HS-PS2-4

Which of the following stages is characterized by the onset of nuclear fusion in a star's core?

• Nebula

• Protostar

• Main Sequence

• Red Giant

Tags

NGSS.HS-ESS1-1