01 Quiz Stellar Life Cycle Stars 2025

What is the source for new stars to form?

• The interstellar medium (ISM) made of gas & dust

• The true vacuum of space

• The galactic wind

• The heliopause

Which of these is true about galactic and stellar winds? (from video)

• They are mostly composed of neutral atoms

• Charged ions are not deflected by our Sun’s & Earth’s magnetic field

• The neutral atoms go through magnetic fields

• Galactic & stellar winds do not help form new stars

What is true about the formation of a solar disk?

• The ISM cools down as it collapses

• The ISM flattens and starts to heat and spin

• Planets do not form from the ISM with the star

• Fusion does not start inside a star’s core

What is the “frost line” concept important for?

• Understanding why rocky planets are close to stars & gas giants are not

• Understanding why planets have different temperatures

• Understanding why there are exactly 8 planets around our Sun

• Understanding the temperature required to form a star

How do planets form?

• Material in the solar disk collides and sticks together, called “accretion”

• Fusion in the star’s core forms the planets

• Planets do not form from the same ISM that the star does

• Fusion does not start inside a star’s core

Which of these is true?

• Gas giants always form closer to a star because of the “frost line”

• The most distant object ever encountered by a spacecraft is a planetesimal

• There are no pictures of solar disk formation

• The word “planetesimal” means “gas giant planets”

What is the name of the gas/dust clouds that form stars?

• Nebulas
• Protostars 
• Supernova
• Neutron Star

Tags

NGSS.HS-ESS1-3

Which statement about stars is correct?

• Star formation begins in a nebula

• White dwarfs become main-sequence stars when they gain mass

• Supergiants are stars that can absorb black holes

• Main-sequence stars are formed by comets

Tags

112.20.b.8.A

What is the name of a "baby" star that has not begun fusion yet?

• Nebula

• Protostar

• Supernova
• Neutron Star

What is the name of the gas/dust clouds that form stars?

• Nebulae

• Protostars 
• Supernova
• Neutron Star