North pole &south pole
Yes
Days get shorter and nights get longer until the winter solstice, at which point the days become longer and the nights become shorter.
Because the sun is out on the daytime
Because it tilts on its axis
No. That would be an Equinox. The solstice is when the earth is tilted at maximum angle, (23 1/2 degrees) from the plane of the orbit around the sun. Either north or south pole is closer. The exact difference of night and day will vary depending on where you are on earth.
no
Because of the tilt of earth's axis.
Because of the tilt of earth's axis.
On Equinoxes
There are some tiny variations because of the tilt of the earth, but we can say that days and nights are roughly equal at the equator.
Yes
tropic of cancer
The vernal equinox.
4 days/ nights and 18 hours
because earth is rotating and revolving
The seasons are already figured out . . . the seasons change on the equinoxes (days and nights of equal length) and on the soltices (days and nights are the most different in length)
At the Equator at the two Equinoxes, Spring and Fall.