What factor determines how stars progress through their life cycle?

• Radiation in the star

• The color of the star

• The original mass of the star

• The location of the star in the universe

Tags

NGSS.HS-ESS1-1

Before the formation of the stars, most matter in the universe consisted of which elements?

• Hydrogen

• Carbon

• Radium

• Helium

What is a nebula?

A cloud of gas and dust...

• that undergo supernova to create a star.

• that produce light through nuclear reactions.

• that surround middle-aged stars (like Mrs. Neuman).

• that form stars or result from dying stars.

What has to begin for a star to be considered a star?

• Gas and dust is brought together by gravity.

• Nuclear fusion begins.

• The star runs out of Hydrogen.

• The core of the star collapses.

According to the table, how does the distance between the Earth and the Sun compare to the distance between Earth and the other stars?

• The Sun and all other stars are the same distance from Earth.

• The Sun is hundreds of thousands of times closer to Earth than any of the other stars.

• The Sun is thousands of times farther from Earth than any of the other stars.

• The Sun is the only star within a distance of 10 light years from Earth.

To which star do we compare the luminosity of all other stars?

• Sirius

• Arcturus

• the Sun

• Proxima Centauri

Star X is brighter than the Sun, has a surface temperature below 25,000 K, and is blue. Where would you find Star X in the HR Diagram?

• A

• B

• C

• D

Tags

NGSS.HS-ESS1-3

Arcturus is plotted in the red circle on the HR Diagram. Which statement best describes Arcturus?

• Dimmer than most main sequence stars and has a relatively low temperature

• Dimmer than most supergiant stars but has a relatively high temperature

• Brighter than most supergiant stars and has a relatively high temperature

• Brighter than most main sequence stars but has a relatively low temperature

The classification of galaxies is based on which characteristic?

• The color of the galaxy

• how many planets make up the galaxy

• the size of the galaxy

• the shape of the galaxy

The Milky Way galaxy is which type of galaxy?

• elliptical

• spiral

• irregular