Life of a Star

Why do most O & B -type stars only last a few million years before dying?

• because they only form in clusters with other large stars

• because they are not found in globular clusters

• O & B -types use up their fuel slowly due to size

• these stars burn through their fuel very quickly due to size

Tags

NGSS.HS-ESS1-3

Core-hydrogen burning in a star refers to

• hydrogen fusing into helium providing an outward pressure.

• the eventual collapse of the core in a sun-like star.

• hydrogen that is burning to form heat & pressure.

• hydrostatic equilibrium.

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

About how long does it take for a sun-like star to run out of fuel in its core?

• about 1 trillion years

• 10 million years

• a few million years

• 10 billion years

Tags

NGSS.HS-ESS1-1

A star will the leave the main sequence once the core becomes unstable forming a red giant.

• True

• False

Tags

NGSS.HS-ESS1-3

Label the graphic organizer

a

b

c

d

e

f

black hole

supernova

planetary nebula

protostar

black dwarf

white dwarf

Tags

NGSS.HS-ESS1-3

A nebula forms when stars ​ (a)   , and it's where ​ new ​ (b)   are formed.

• die

• stars

Tags

112.20.b.8.A

Once the unstable core of a sun-like star expands & shrinks, helium starts to fuse into carbon.

• True

• False

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

A ____ occurs in a sun-like star when mass quantities of helium are suddenly fused in the core.

• carbon-nuclear explosion

• helium/carbon flash

• hydrogen flash

• helium flash

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

Low mass red dwarfs are classified as ____ -type stars and can live up to 10 trillion years.

• M

• O & B

• visual binary

• spectroscopic binary

Tags

NGSS.HS-ESS1-3

High-mass stars (O & B) die ____ while low-mass stars tend to go out ____.

• violently, gently

• quietly, explosively

• explosively, violently

• with a whimper, with a bang

Tags

NGSS.HS-ESS1-3