Why does water feel cooler when Glucose is added and stirred?

Whenever a solid is dissolved in water some energy change takes place. In most cases the amount of this change is negligible and is hardly noticeable.

But in some cases, it is quite large and leads to large changes in temperature, a rise or fall depending upon whether the heat of solution is positive or negative. Heat is absorbed when glucose is dissolved in water. As a result, the temperature drops and the solution feels cool.

What are Food Chains?

Every living organism is involved in a food chain. For example, a snail eats leaves, a bird eats the snail, a cat eats the bird. Every food chain begins with some kind of plant. It is because plants are the only organisms which can make food by photosynthesis in the presence of sunlight.

Hence all animals are dependent on plants. Food chains are also known as energy chains, because it is through the various links in the chain that animals and human beings get their energy.