8th Grade Components of the Universe

A light year is...

• The speed light travels
• How long it takes light to get to you from the sun
• The distance light can travel in a year
• How many years it takes light to be emitted

What does the Big Bang theory suggest?

• The universe was just there
• The Milky Way is the only solar system
• The universe is continually expanding
• The universe started as a point and is moving towards each other

Place these objects in order from smallest to largest.

• Universe, galaxy cluster, planets

• Solar system, planets, galaxy, universe

• Planets, solar system, galaxy, universe

• Galaxy, solar system, planets, universe

Which category is our Sun located in?

• White Dwarfs
• Supergiants
• Main Sequence
• Giants

Which star has the lowest luminosity?

• A
• B
• C
• D

The luminosity of a star correlates most closely with a star's...

• size
• color
• spectral class
• temperature

Where is the Earth found in a Milky Way, our Galaxy?

• In the middle of the galaxy
• On the Edge  of a Spiral arm
• In Andromeda 
• Earth is moving side to side of the galaxy

The light of Proxima Centaury takes 4.3 years to reach Earth.  What does it mean?

• The star is 4.3  miles from Earth
• The star is 4.3 light years from the  Earth
• The star is 43.000.0000.000. light years fromm the  Earth
• The  star is  4.3 km  from the Earth

What force keeps  together all the stars in a galaxy?

• Centrifugal force
• Fiction
• Gravity
• Wind

In a large mass star, the temperature reaches more than 100 billion degrees. The repulsive forces between the iron nuclei explode the star’s mass into space in a ....

• Nebula
• Black Hole
• Supernova
• Neutron star