Stellar Evolution

Most stars are identified as ___________ on an H-R Diagram?

• Supergiants
• Giants
• Main Sequence
• White Dwarf

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

What is the first phase in the life cycle of a star?

• molecular gas cloud

• protostar

• main sequence star

• white dwarf

Once a star uses up all of the _________ in its core, the star will expand into a giant or supergiant

• light

• heat

• energy

• hydrogen

Tags

NGSS.HS-ESS1-1

What determines if a star becomes a giant or a supergiant?

• star mass

• star temperature

• star color

• star luminosity

Tags

NGSS.HS-ESS1-3

A hypothetical star cluster produces the HR diagram shown. This is known as:

• Zero-age main sequence

• A globular cluster

• An open cluster

• The CNO sequence

The image shown is an example of a(n) _____________

• Open cluster

• Globular cluster

• Shockwave

• Black hole

The image shown is an example of a(n) _________________

• Globular cluster

• Open cluster

• Time dilation

• Planetary nebula

The line in yellow shows the life sequence of a

• high mass star

• low mass star

• neutron star

• globular cluster

After a low mass star sheds its outer layers into a planetary nebula, it leaves behind its core, called a

• White Dwarf

• Neutron Star

• Protostar

• Zero-age main sequence

When a large enough mass of instellar gas compresses, it begins to heat up and rotate. At this point, a __________ has formed.

• giant molecular cloud

• protostar

• red giant

• planetary nebulae