Do you know Planet Earth? Take the quiz.

The DSCOVR satellite took this photo on July 6, 2015. It’s the first image of Earth’s entire sunlit side ever taken by DSCOVR, which launched in February 2015 and is a joint project involving NASA, NOAA, and the US Air Force.

You live here, work here, play here, eat here, and sleep here. But how well do you know your native planet?

1. What is Earth's circumference at the equator?

About 2,500 miles

About 25,000 miles

About 250,000 miles

About 2.5 million miles

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