Answer the question based on the following text.  Question:   Sue sees a star with a high frequency. Erin sees a star with a low frequency. The hotter star belongs to Sue or Erin?    Text:  Shorter wavelengths (higher frequencies) correspond to higher energies and thus hotter star temperatures.
Sue

Answer the question based on the following text.  Question:   Stars that are colder are also dimmer or brighter?    Text:  The hotter a main sequence star is, the brighter it is.
dimmer

Answer the question based on the following text.  Question:   What happens to a light car when it has the same power as a heavy car accelerates faster or accelerates slower?    Text:  The smaller its mass is, the greater its acceleration for a given amount of force.
accelerates faster

Answer the question based on the following text.  Question:   If greenhouse gas were to be halved, the global temperature would increase or decrease?    Text:  A decrease in greenhouse gas levels decreases global temperature and an increase raises global temperature.
decrease