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Select all that apply (there will be 4 selected):  Which are the benefits of physical activity in children ages 6-17?

Obesity only develops because of factors within our own personal control which includes overeating and lack of exercise.

Health improvements associated with increased overall daily activity are most likely associated with:

Which of the galaxies, both shown in the figure and in the choices below, likely contains the most star formation.  

Why does the Cepheid “standard candle” have limited usefulness beyond about 20 Mpc?

Below is an incomplete table of information on 3 main sequence stars. Using the HR diagram below, determine the missing piece of information in cell vi.)  

What is it about the Sun’s corona that astronomers don’t understand?

The image below depicts light incident on a cloud of gas and dust from the left.  Which lines are indicative of the longer wavelength light?   

What is the typical main sequence lifetime of a G-type star?

In Figure C, which star is hotter?