The Universe

What kind of galaxy do we live in?

• An elliptical

• An irregular

• A magellanic

• Spiral or disc-like

Where would we find our solar system in this representation of our galaxy?

• Near the center

• Halfway between the center and the edge

• Outside the galaxy

• Near the edge of a spiral arm

According to the diagram, which of these types of stars is the brightest?

• hot White Dwarf

• hot Main Sequence Star

• cool Super Giant

• cool Giant

The brightest stars can be located-

• At the top

• On the bottom

• To the right

• To the left

On a H-R diagram, the temperature increases to the-

• Right

• Left

The hottest, newest stars are what color?

• Blue

• Yellow

• Purple

• Red

The least hot, older stars are which color?

• Blue

• Orange

• White

• Red

Which of the following would BEST support the theory that the universe undergoes a life cycle that lasts billions of years?

• Finding another planet in the solar system similar to our planet

• Discovering life-forms on another planet

• Observing blue or red shifted light from stars

• Figuring out that many particles formed the universe

Which of these observations of Barnard’s Star is most likely accurate?

• Barnard’s Star is less bright than the Sun, has a surface temperature below 3,800K and is red.

• Barnard’s Star is less bright than the Sun, has a surface temperature above 3,800K and is red

• Barnard’s Star is brighter than the Sun, has a surface temperature below 5,300K and is yellow.

• Barnard’s Star is brighter than the Sun, has a surface temperature above 5,300K and is yellow.

Based on the diagram, which type of stars would belong to spectral class O and have the highest luminosity (brightness)?

• Main-sequence stars

• Giants

• Supergiants

• White dwarfs