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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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
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
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