Friday, December 14, 2007

Why does daylength change through the year?
Earth's tilt is responsible for changing daylength as well as the changing seasons. In summer, when the North Pole tilts towards the Sun, it is light there 24 hours a day. Everywhere else in the Northern Hemisphere has a relatively long day and short night. In winter, the position is reversed. The North Pole tilts away from the Sun and the Northern Hemisphere has a relatively short number of daylight hours. The same situation occurs in the Southern Hemisphere.

Tag :daylength