Unit 3 Lesson 1

Where are protostars born?

• stellar nebula

• planetary nebula

• supernova

What is the longest phase a star’s life cycle?

• supernova

• red giant

• main-sequence

What determines the stages of a star’s life cycle?

• its mass

• its color

• its brightness

Tags

NGSS.HS-ESS1-1

Which gas is exhausted when stars enter the giant or supergiant phase?

• hydrogen

• helium

• neon

What do stars that are more than 8 times more massive than the sun become after the main-sequence stage?

• red giant

• red supergiant

• planetary nebula

What is a star called before it can fuse hydrogen into helium?

• pulsar

• neutron star

• protostar

What best describe the giant explosion that occurs when a massive star collapses and throws its outer layers out into space?

• black hole

• planetary nebula

• supernova

Which process produces an enormous amount of energy during a star’s life cycle?

• nuclear fission

• nuclear fusion

• radiative fusion

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8