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the meridians form a rectangular grid of straight vertical lines, while the parallels form straight horizontal lines
the goode projection
equal area map often used to display information such as climate or soil type (indicates the true sizes of regions on the Earth's surface)
time system based on the local time of a standard meridian and applied to the belts of longitude extending roughly 7.5 on either side of that meridian
winter (december) solstice
the subsolar point is at 23.5 degrees south--Tropic of Capricorn (southern hemisphere is tilted toward the sun)
summer (june) solstice
the subsolar point is at 23.5 degrees north--Tropic of Cancer(northern hemisphere is tilted toward the sun)
instant in time when the subsolar point falls on the Earth's equator and the circle of illumination passes through both poles
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