Microsoft Rewards Bing Earth Quiz: Measured around the equator, what’s the Earth’s circumference?
A 12,358 miles
B 24,901 miles
C 247,365 miles
The measurement of Earth around the equator is 24,901 miles, plus about a half-mile more. Perhaps that extra bit is from all the bulging caused by centripetal force.
The correct answer is 24,901 miles.
Microsoft Rewards Bing Earth Quiz: Which of these accurately describes the shape of planet Earth?
A Bulging sphere
B Dodecagonal
C Jelly bean-like
Due to our planet’s rotation on its axis, centripetal forces push on the North and South poles causing the globe to bulge a little around the equator. That shape is called an oblate spheroid.
The correct answer is Bulging sphere.
Microsoft Rewards Bing Earth Quiz: How many days does it take Earth to complete one orbit of the sun?
A 365.25
B 365
C πr2
Based on three different models of measuring our solar year, one trip around the sun takes about 365 days…and an extra quarter of a day. That’s why every four years, with a few exceptions, we add an extra day to the calendar and enjoy February 29—Leap Day.
The correct answer is 365.25.
Microsoft Rewards Bing Earth Quiz: What is the biggest influence on Earth’s weather and climate patterns?
A Ocean currents
B The sun
C Gravity
The large-scale movement of ocean waters—such as the Gulf Stream—can affect air temperatures, precipitation, and a variety of other aspects of ecosystems around the world. It’s just one more reason to keep our oceans healthy.
The correct answer is Ocean currents.
Microsoft Rewards Bing Earth Quiz: What percentage of Earth’s surface is covered in water?
A 31%
B 51%
C 71%
Most of the planet is covered in water, with the Pacific Ocean alone making up 30% of the surface. Less than 3% of the surface is fresh water.
The correct answer is 71%.