WVGSA Grade 5 Science Practice Questions - West Virginia General Summative Assessment Grade 5 Science Exam

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A student analyzes data for four stars: - Sun: Distance = 0.000016 light-years; Real Energy Output = 1 Solar Unit; Apparent Brightness = Extremely Bright (-26.7) - Alpha Centauri: Distance = 4.37 light-years; Real Energy Output = 1.5 Solar Units; Apparent Brightness = Dim Star (0.0) - Rigel: Distance = 860 light-years; Real Energy Output = 120,000 Solar Units; Apparent Brightness = Bright Star (0.1) Which conclusion is supported by the data table?

Stars with the highest real energy output always appear brightest from Earth. The Sun appears vastly brighter than Rigel because the Sun is millions of times closer to Earth. Rigel is closer to Earth than Alpha Centauri. All stars are located at equal distances from Earth.

Correct Answer:

The Sun appears vastly brighter than Rigel because the Sun is millions of times closer to Earth.

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