Components of the Universe

Where does the formation of new stars occur?

• supernova

• nebula

• white dwarf

• main-sequence

Which type of star belongs to spectral class B with the lowest luminosity?

• Main-sequence

• Giants

• Supergiants

• White dwarfs

Tags

NGSS.HS-ESS1-3

Which of the following has less mass than a star?

• Galaxy

• Universe

• Planet

• Nebula

Which of the following has more mass than a star?

• Galaxy

• Planet

• Moon

• Dwarf planet

Which of the following correctly describes a star?

• A sphere of matter that is a collection of dust and gas formed by multiple nebulae.

• A sphere of matter that produces heat and light from its nuclear reaction at its center.

• A sphere of hot gases that produces no light.

• A sphere of dust and gas that produces light, but no heat.

Tags

NGSS.HS-ESS1-1

Why does the sun appear to be brighter than other stars with a higher luminosity?

• The sun is hotter than other stars.

• The sun is a different color than other stars.

• The sun is larger than other stars.

• The sun is closer to Earth than other stars.

What can a star's composition tell us?

• Its distance from Earth.

• Its temperature.

• Its age.

• Its size.

Tags

NGSS.HS-ESS1-3

Based on the HR diagram, how does star 2 compare to star 1?

• Star 2 is hotter and brighter than star 1

• Star 2 is cooler and less bright than star 1

• Star 2 is cooler and brighter than star 2

• Star 2 is hotter and less bright than star 2

What spectral class is star 2 in?

• B

• A

• F

• G

Tags

NGSS.HS-ESS1-3

How is the size of our sun classified?

• One of the smallest stars

• One of the largest stars

• A medium-sized star

• One of the largest stars, but only in our galaxy