Stellar Evolution Unit Review

Stars can take different evolutionary paths due to their initial:

• Brightness

• Mass

• Temperature

• Color

When a red giant's outer atmosphere drifts away, it becomes:

• Expanding nebula

• Planetary nebula

• White dwarf cloud

• Planetary cloud

Stars like the Sun probably do not form iron cores during their evolution because

• All the iron is ejected when they become planetary nebulas.

• Their cores never get hot enough.

• Their strong magnetic fields keep their iron in their atmospheres.

• The iron converted in heavier elements through proton capture

At the late stage of a low mass star's evolution, the outer layers escape into space, leaving behind a:

• White dwarf

• Neutron star

• Red giant

• Supernova

What do we call a cloud of gas and dust in space where stars are born?

• Nebula

• Main Sequence

• Supernova

• Black Hole

What do we call a star that is stable in size and shape, and is undergoing hydrogen fusion in its core?

• Nebula

• Main Sequence Star

• White Dwarf

• Neutron Star

Tags

NGSS.HS-ESS1-3

When a sun-sized star runs out of fusible hydrogen and begins to fuse helium in its core, it forms a...

• Giant Star.

• Supergiant Star.

• Black Hole.

• Nebula.

Tags

NGSS.HS-ESS1-3

NGSS.HS-ESS1-1

When does a star change from Main sequence to Giant, as well as Giant to Supergiant?

• When the mass gets high enough

• when it runs out of fuel for fusion

• when it gets bright enough to be higher on the HR diagram

• after 1 billion years

When a supergiant star runs out of fusible elements, it collapses in on itself and explodes in an event called a...

• supernova.

• planetary nebulosis.

• fusion.

• the big bang.

Tags

NGSS.HS-ESS1-3

When a massive star dies, it can form an object so dense that its gravity even pulls in light. This object is called a...

• giant star.

• white dwarf.

• black hole.

• nebula.