When temperatures are high enough in the core of a high-mass star, this element starts to form.

• helium

• carbon

• oxygen

• hydrogen

Tags

NGSS.HS-ESS1-3

When fusion in low-mass stars form this element in its core, the helium flash stage begins.

• helium

• carbon

• oxygen

• hydrogen

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

When an ______ core is reached in a high-mass star, gravity takes over.

• iron

• carbon

• oxygen

• helium

Tags

NGSS.HS-ESS1-3

When an iron core is reached gravity takes over and a(n) _________ occurs.

• black hole

• neutron star

• explosion

• supernova

Tags

NGSS.HS-PS1-8

Supernovas are one of the largest _______ in the Universe.

• events

• stars

• explosions

• objects

Tags

NGSS.HS-ESS1-3

Almost all stars form from nebulae at about the same time in _____.

• clouds

• galaxies

• groups

• clusters

Stars that orbit close to each other can overflow their Roche lobes to form a ______

• binary star system.

• contact binary.

• supernova.

• eclipsing binary.

Tags

NGSS.HS-ESS1-3

Supernova explosions always occur when a high-mass star uses up fuel at its core.

• True

• False

Tags

NGSS.HS-ESS1-3

For a sun-like star on the main sequence, change will gradually occur as it evolves.

• True

• False

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

All elements heavier than carbon were formed in supernova explosions.

• True

• False

Tags

NGSS.HS-ESS1-3