10 - 90 years
There are a couple different types of maps that let you know the length of the growing seasons. First off, the tomato growing map allows you to see the length of growing seasons. Also, the sunset climate zone lets you see the length of growing seasons.
130 days
The tilt of the Earth's axis with respect to its orbital plane about the sun causes the seasons and the changing length of the day outside the tropical regions.
Tropical rainforest habitats do not experience the seasons that temperate climates experience. Therefore the trees to not need to prepare for a cold winter by dropping their leaves and storing there resources. Light levels are also less variable around the tropics, meaning day length is fairly consistent --which is ideal for photosynthesis.
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)
Antarctica's seasons are the same length as the seasons throughout the southern hemisphere.
i believe that the seasons are not exactly of the same length. because a year has 365 days. 365 is not even and is not divisible by 4. therefore it can never be of same length. if they are of the same length somehow, the seasons must have shifted to some other time of year as years go by.
Seasons
seasons
Seasons :)
The length of the day and the length of the seasons
For accurately measuring the length of the seasons