Q 01/05
A) Land and Water
B) Eastern and Western
C) Tropical and Polar
D) Northern and Southern
Answer · why
Northern and Southern. The seasons flip across the line: Earth's tilt turns one half toward the Sun at a time, so a July summer in the north is a July...
Q 02/05
A) 0 degrees
B) 23.5 degrees
C) 90 degrees
D) 180 degrees
Answer · why
0 degrees. Nature fixes latitude's starting line midway between the poles, but longitude's had to be agreed by vote: an 1884 conference in Washington ...
Q 03/05
A) About 400 km
B) About 4,000 km
C) About 40,000 km
D) About 400,000 km
Answer · why
About 40,000 km. Around 240 BC the Greek scholar Eratosthenes came close to that figure by comparing noon shadows in two Egyptian cities a known dista...
Q 04/05
A) Circle equalizing day and night
B) Circle dividing the world equally
C) Circle halfway between the poles
D) Circle of the greatest heat
Answer · why
Circle equalizing day and night. The name first belonged to the sky's equator: when the Sun crosses it, twice a year, day and night are the same lengt...
Q 05/05
A) Tropic of Cancer
B) Tropic of Capricorn
C) Arctic Circle
D) Antarctic Circle
Answer · why
Tropic of Cancer. It was named some 2,000 years ago, when the June solstice Sun stood among the stars of Cancer; the sky has since drifted, and the Su...
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