8th Grade: Astronomy Quiz #2

True or False: The stars with the coolest temperatures are blue in a HR diagram.

• True:  The stars with the highest temperature are red on the diagram, while stars with the coolest temperatures are blue.
• False:  The coolest stars are yellow on the HR diagram
• False:  The coolest stars are red on the HR diagram

On the HR diagram, a star's luminosity, refers to its ______________.

• Magnitude or Color
• Magnitude or Brightness
• Temperature or Color
• Distance or Temperature

Why is it we cannot see the entire shape of The Milky Way?

• Because The Milky Way is so far away from Earth
• Because there are too many stars at the center of our galaxy
• Because we live in the Milky Way, and all of the stars, gases, and dust that are with us inside the galaxy make it difficult for us to see it
• Because we are at the center of the Milky Way

If a scientist was trying to observe an object that was emitting waves with a frequency of 10^-11  , they would need to use a telescope that could detect what?

• X-rays
• Radio waves
• Gamma Rays
• Infared Rays

Using the HR diagram, which of the following is TRUE of Red Supergiants?

• They are brighter than our sun, but have a lower temperature
• They are brighter than our sun, and have a higher temperature
• They are the biggest stars in the galaxy
• They are very bright and very hot stars

Currently our sun is in its ___________________ stage of life.  Its last phase of life will be when it is a _________________ star.  

• white dwarf, main sequence
• nebulous, red giant
• main sequence, white dwarf
• yellow giant, white dwarf

Which of the following shows the correct order from GREATEST mass to LEAST mass

• Star > moon > planet
• Galaxy > star > planet
• Galaxy > planet > star
• Planet > star > moon

This is a picture of The Milky Way, where would our sun be located?

• Directly in the middle
• Towards the outside but NOT at the edge
• All the way on the outside
• Somewhere near the top

Which star will have a longer life cycle- a massive Blue Star or a Red-Dwarf Star?  How do you know?

• A Red-Dwarf Star bc it has a smaller mass
• A Blue Star bc it has a greater mass
• A Red-Dwarf star bc it has a lower temperature
• A Blue Star bc it more luminous