Water moves to the top of tall trees because of capillary action surface tension capillary action and evaporation vapor pressure

capillary action and evaporation

Explanation:

The pulling effect of evaporating water from the leaves and other parts of plants provides the driving mechanism for water to reach greater parts in a plant. Evaporation of water during a hot day would cause water to rise through conduit-like pipes in plants which leads to rise of water from the root to areas that lacks them.

This process is even made much more easier by capillary action which is the unaided movement of water or fluid in a narrow tube as a result of its own pressure. Evaporation would facilitate the process of capillary action and together, they both drive water to greater reaches of plants from the root.

double the distance = divide strength by 4

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