Shorter wavelengths (higher frequencies) correspond to higher energies and thus hotter star temperatures.  Having read the above passage, choose the right answer to the following question (choices are Sue or Erin ):   Sue sees a star with a high frequency. Erin sees a star with a low frequency. The hotter star belongs to Sue or Erin?
Sue

The hotter a main sequence star is, the brighter it is.  Having read the above passage, choose the right answer to the following question (choices are dimmer or brighter ):   Stars that are colder are also dimmer or brighter?
dimmer

The smaller its mass is, the greater its acceleration for a given amount of force.  Having read the above passage, choose the right answer to the following question (choices are accelerates faster or accelerates slower ):   What happens to a light car when it has the same power as a heavy car accelerates faster or accelerates slower?
accelerates faster

A decrease in greenhouse gas levels decreases global temperature and an increase raises global temperature.  Having read the above passage, choose the right answer to the following question (choices are increase or decrease ):   If greenhouse gas were to be halved, the global temperature would increase or decrease?
decrease