Life Cycle of Stars and HR Diagram

There are four groups of stars on the HR Diagram. About 90% of all stars are in the ________.

• Supergiants

• Giants

• White dwarfs

• Main sequence

Stars are classified on the HR Diagram by...

• luminosity and brightness.

• temperature and absolute magnitude (or luminosity).

• temperature and apparent magnitude.

• temperature and distance.

What are nebulae?

• galaxies with an oval or egg shape
• large orbiting rocks in the asteroid belt
• large clouds of gas and dust where stars are born
• the galaxy our solar system is in

All stars begin their life in a

• Main Sequence

• Nebula

• Super Giant

• Black Dwarf

Tags

NGSS.HS-ESS1-3

The life cycles of stars are determined by their

• mass

• color

• distance from Earth

• luminosity

Tags

NGSS.HS-ESS1-3

NGSS.HS-ESS1-1

The death of an extremely massive star by a large, violent explosion is called a

• pulsar

• red giant

• supernova

• black hole

Tags

NGSS.HS-ESS1-3

Most stars are made of

• Helium only

• Hydrogen and Carbon

• Helium and Carbon

• Hydrogen and Helium

Tags

NGSS.HS-ESS1-3

NGSS.HS-ESS1-1

A ________ is an extremely dense object with so much gravity that even light cannot escape.

• neutron star

• white dwarf

• black hole

• nebula

True or False: Bigger stars burn their fuel faster and have shorter life spans than smaller stars.

• True

• False

Which labeled point on the diagram would have the highest luminosity?

• A

• B

• C

• D