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

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A long-exposure photograph taken over 4 hours pointing at the North Star (Polaris) shows stars forming circular light trails centered around Polaris. What causes this visual trail pattern?

Stars orbit around Polaris every 4 hours in space. Earth's rotation on its axis makes nighttime stars appear to move in circular arcs around the celestial pole. Solar winds push stars in circles across the sky. Earth's gravity bends starlight into circles.

Correct Answer:

Earth's rotation on its axis makes nighttime stars appear to move in circular arcs around the celestial pole.

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