Stars and Galaxies Quiz

Stars form from a huge cloud of gases and dust called a(n) (a)   .

• nebula
• galaxy
• black hole
• asteroid

When the cloud contracts and powerful reactions start to turn hydrogen atoms into helium atoms to produce energy, a(n) (a)   forms.

• star
• planet
• galaxy
• comet

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

After billions of years, the hydrogen fuel of a star begins to run out and the star expands to become a (a)   .

• red giant
• white dwarf
• neutron star
• black hole

A star that begins life with much more hydrogen than a medium-size star such as our Sun ends its life as an exploding star called a(n) (a)   .

• supernova
• nebula
• white dwarf
• black hole

Very massive stars end their lives as (a)   , which are objects with gravity so powerful that even light cannot escape from them.

• black holes
• neutron stars
• white dwarfs
• supernovae

Stars are classified by their size, , and temperature.​ (a)  

• color
• brightness
• volume

The Sun is a medium-size ​ star with a surface temperature of about 6000°C.​ (a)  

• giant
• white dwarf
• neutron
• yellow

By studying the motion of distant stars, scientists have discovered about 160 (a)   outside our solar system.

• exoplanets
• asteroids
• comets
• galaxies

Patterns of stars in the sky are (a)   .

• constellations
• galaxies
• planets
• comets

Most stars are so far from Earth that astronomers use huge measuring units, such as the (a)   , to describe the distance.

• light-year
• kilometer
• mile
• meter