The length of twilight depends on ______
a. ?just the seasons
b. ?just the latitude
c. ?just the longitude
d. ?season and latitude
e. ?season and longitude
ANSWER: d
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In the grid of coordinates that cover the earth, lines of ________ intersect at the North and South Poles
A) latitude B) longitude C) prime meridians D) parallel
Which pair of variables below are not related in a positive feedback loop?
A. snow cover on Earth's surface; global average temperature B. population of rabbits and bobcats C. water vapor and air temperature D. population of hummingbirds and population of flowers
Glacial moraines are composed of ________
Fill in the blank(s) with correct word
Surface weather information is provided by more than ____ land-based stations and hundreds of ships and buoys providing surface weather information at least four times a day
a. ?100 b. ?10,000 c. ?100,000 d. ?1,000,000 e. ?10,000,000