Star Formation & Nucleosynthesis

Stars are 96% - 99% ____ and ___.

• gas, dust

• helium, hydrogen

• hydrogen, helium

• hydrogen, carbon

The giant molecular clouds that form new stars are also called ___.

• pulsars

• white holes

• nebulae

• protostars

The formation of large atomic nuclei from smaller atomic nuclei in the core of stars by nuclear fusion is called :

• nuclear fusion

• nucleosynthesis

• gravitational collapse

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

NGSS.HS-PS1-8

When the sun becomes a ____ it will start fusing helium into carbon.

• white dwarf

• red dwarf

• supergiant

• red giant

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Sun-like stars shed their outer layers as they age, forming:

• planetary nebulae

• pulsars

• red dwarfs

• red giants

Tags

NGSS.HS-ESS1-3

Te core left after a sun-like star sheds its outer layers is no longer fusing anything. It is a _____.

• pulsar

• red giant

• white dwarf

• supernova

Elements past iron on the periodic table form in what happens to very massive stars when they "die" in an event called a ___.

• nova

• supernova

• pulsar

Tags

NGSS.HS-ESS1-3

Collapse of giant molecular clouds is often triggered by:

• planetary nebulae

• pulsars

• supernova shockwaves

• solar winds