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Climate
Not to be confused with weather, climate represents Earth's average conditions over time.
Climate isn't the same thing as weather. Weather is the condition of the atmosphere over a short period of time; climate is the average course of weather conditions for a particular location over a period of many years.
One of the factors that influences climate is the angle of the sun's rays. In the tropics, between 23.5° N and 23.5° S, there is at least one time of year when the noontime sun is directly overhead and its rays hit at a direct angle. This produces a hot climate with relatively small temperature differences between summer and winter.
In the Arctic and Antarctic (north or south of 66.5° latitude), there are times of year when the sun is above the horizon