The earth is a sphere or round. This is a known fact for more than 2,000 years. The ancient Greeks measured shadows during summer solstice and were able to calculate the earth’s circumference.

Now, the earth is not a perfect sphere. And likewise, the orange is a sphere, but is not perfectly round, so this is a perfect visual. The earth is slightly flat at the North and South poles because of the force caused when the earth rotates. 

Find the stem. This represents the North Pole. Mark with the letters NP using a sharpie. Then find the blossom. This represents the South Pole. Label with SP. 

Find the halfway point between the North and the South Pole. Draw a line all the way around the orange. This represents the equator. The equator is the imaginary line that is equidistant between the North and South Poles. Label the equator with an E. Refer to the equator on your globe and world map.