Where on our planet are polar day and night possible? Why?

There are polar days and nights at the South and North Poles. They occur when our planet, the Earth, revolves around the Sun and tilts either south or north, as a result of which changes occur every 6 months.
Having figured out what a polar day is, you can determine the geography of this natural phenomenon on a map. It can be observed in different countries. The list of such states should be noted:
Norway; Russia; Canada; Finland; Sweden; Greenland; Iceland.



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