The equatorial circumference of Earth is approximately __________ kilometers.
40,075 kilometers (24,901 miles).
The polar circumference of Earth is approximately __________ kilometers.
40,008 kilometers (24,860 miles).
The difference in Earth's circumference measurements is due to its __________ shape.
oblate spheroid shape.
Earth's shape is slightly __________ at the poles and __________ at the equator.
flattened; bulging.