Life of a Star

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

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

Which statement best describes M-type stars?

• they can be red or orange-yellow in color

• almost all M-type stars ever born are still around

• their surface temperatures range from 10 - 50,000 ^oF

• almost all M-type stars ever born have died out

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-ESS1-1

NGSS.HS-ESS1-3

Medium-size stars (like our Sun & Alpha Centauri A) tend to

• go out or die in stages.

• live most of their lives off the main sequence.

• sometimes expand until they explode.

• turn into white dwarf stars fairly quickly.

Tags

NGSS.HS-ESS1-1

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

The outward force of core-fusion balances the inward force of gravity. This is called ____.

• hydrostatic fusion

• gravitational balancing force

• hydrostatic equilibrium

• solar equllibrium

Tags

NGSS.HS-ESS1-1

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

What happens to the core in a sun-like star after all the hydrogen is used up?

• the core will start fusing carbon instead

• it will collapse

• the core explodes

• it starts to expand

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

"Hydrogen-shell burning" refers to core

• imminent collapse causing a supernova explosion.

• expansion in a sun-like star to continue fusing hydrogen.

• contraction in a sun-like star to continue fusing hydrogen.

• hydrostatic equilibrium to cease.

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3