industrial infrastructure definition, industrial infrastructure meaning | English dictionary. industrial. n (in the U.S.) a federation of industrial unions formed in 1935. n (Brit) any action, such as a strike or go-slow, taken by employees in industry to protest against working conditions, redundancies, etc.
What causes the seasons? The seasons are caused by the tilt of the Earth's rotational axis away or toward the sun as it travels through its year-long path around the sun. The Earth has a tilt of 23.5 degrees relative to the ecliptic plane (the imaginary surface formed by it's almost-cicular path around the sun).
There are a few reasons why seasonal dates can vary from year to year. 1  A year is not an even number of days and neither are the seasons. 2  Another reason is that the Earth's elliptical orbit is changing its orientation relative to the Sun (it skews), which causes the Earth's axis to constantly point in a different direction, called precession.