<em>The glucose molecule's principal function is to provide energy; it is a fuel. Glucose is a soluble, widely distributed kind of chemical energy that may be 'burned' in the cytoplasm and mitochondria to produce carbon dioxide, water, and energy.</em>
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Entropy is a measure of disorder or molecular randomness
The increased temperature causes the water to be less dense because the extra heat energy causes the water molecules to spread out more as the molecules have more kinetic energy. Therefore, the current would become weaker because there is less dense water sinking to create this current.