Space Science Unit Preview

Which process causes a stars to give off light?

• nuclear fusion
• condensing of gases
• exposing of the core
• ejecting matter into space

True or False.
A galaxy contains stars, gas and dust.  This matter must be held together or galaxy will break apart. 

• True
• False

What is responsible for holding the stars, gas and dust together in a galaxy?

• heat
• light
• gravity

Which of the following terms is used to describe several planets orbiting a star?

• the universe
• a solar system
• a galaxy 
• a constellation

Which of the following statements best relates a star's color to its surface temperature?

• a red star has a relatively high temperature
• a blue star has a relatively low temperature
• a yellow star has a relatively low temperature
• a blue-white star has a relatively low temperature

True or False.  The moon is much larger than the sun. 

• False
• True

Why do the sun and moon appear to be the same size when viewed from earth?

• The moon is much hotter than the sun
• The moon is much denser than the sun
• The moon is much brighter than the sun
• The moon is much closer to the Earth than the sun

Which of the following are located between galaxies?

• stars
• voids
• moons
• planets

What is the actual brightness of an object such as a star?

• luminosity
• absolute magnitude
• apparent magnitude

True or False. Terrestrial planets are planets that orbit nearest to the sun.

• True
• False