What are automated weather stations? locations with instruments that measure weather conditions in specific land areas numerical equations based on weather-related factors that forecast weather objects that carry instruments into the stratosphere to measure atmospheric conditions structures that orbit earth in the exosphere to capture images and collect data

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By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.