Stars & Galaxies

The diagram below represents a side view of the Milky Way Galaxy. At approximately which position is Earth's solar system located?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-2

About what percentage of stars spend their life on the Main Sequence?

• 25%

• 50%

• 75%

• 90%

What shape is the Milky Way Galaxy?

• Elliptical

• Spiral

• Irregular

• Circular

What type of star is the Sun?

• Red Giant

• White Dwarf

• G-type Main Sequence

• Super Giant

The Sun is considered a Main Sequence star because:

• it is in the stable phase of its life, fusing hydrogen into helium in its core.

• it is the largest star in the galaxy.

• it is the oldest type of star in the universe.

• it does not produce any energy.

Tags

NGSS.HS-ESS1-1

The difference between a Red Giant and a Super Giant star is:

• Red Giants are smaller and less luminous than Super Giants.

• Red Giants are hotter than Super Giants.

• Super Giants are older than Red Giants.

• Red Giants have more mass than Super Giants.

Stars are formed from a cloud of dust and gases through which process?

• Condensation and nuclear fusion

• Evaporation and crystallization

• Sublimation and precipitation

• Freezing and melting

A ________________ is a collection of billions of stars and gas held together by gravity.

• galaxy

• planet

• asteroid

• comet

Tags

NGSS.MS-ESS1-2

________________ is a measure of how bright a star is compared to our Sun.

• Luminosity

• Temperature

• Mass

• Radius

A ____________ is the distance that light travels in one year (about 6 trillion miles).

• light year

• parsec

• astronomical unit

• kilometer