DOL #1 Life Cycle of a Star 1-15-25

1. Which statement about stars is correct?

• Supergiants are stars that can absorb black holes.
• White dwarfs become main-sequence stars when they gain mass.
• Star formation begins in a nebula.
• Main-sequence stars are formed by a neutron star.

Tags

NGSS.HS-ESS1-3

2. During which of the following phases does the core of a massive star have so much gravity that even light can't escape?

• Supernova
• red giant
• white dwarf
• black hole
• main sequence,

3. A star stand off includes the following A battle between gravity and gas pressure Reactions within life cycle phases where gravity and gas pressure are constantly changing Equilibrium is reached when both are equal Force is pushed in and gas is pushed out The balance between gravity and gas pressure during a star's life cycle. How do these forces change at different stages of a star's evolution, and what happens when equilibrium is reached?

• A.) Gravity pulls inward, while gas pressure pushes outward, maintaining balance during a star's main sequence phase. In the later stages of the star's life, gas pressure continues to outweigh gravity, causing the star to expand into a supergiant.
• B.) During the main sequence, gas pressure and gravity balance each other, preventing the star from collapsing. As the star ages, gravity dominates, leading to contraction, while gas pressure increases and eventually causes a supernova.
• C.) Gravity and gas pressure are always in perfect equilibrium throughout a star's life, with no changes in their interaction at any stage of the star’s evolution. This equilibrium causes the star to remain constant in size throughout its life.
• D.) In the later stages of a high-mass star, gravity overpowers gas pressure, causing the star to collapse into a black hole or neutron star. For low-mass stars, gas pressure overcomes gravity and the star becomes a white dwarf.

Tags

NGSS.HS-PS2-1

4. What is the next sequence of events that will occur for our Sun billions of years from now?

• main sequence, red giant, white dwarf
• main sequence, black hole, supernova, red giant, nebulae
• main sequence, supergiant, supernova, black hole
• main sequence, supergiant, supernova, neutron star

Tags

NGSS.HS-ESS1-1

5. Compare and contrast Star A and Star E, in the diagram. Which is the correct estimate of the temperature? the spectral class, temperature, and age of each star.

• A.) 25,000

• B.) 10,000
• C.) 6,000
• D.) 3,000

Bonus question Compare and contrast Star A and Star E, in the diagram. Which is the correct age of each star?

Answer explanation

A star is Main sequence and E star is white dwarf.