1.You feel hungry because of the satiety center in your brain falls short of particular hormones to function and then sends the signal of hunger. 2.You fall in love, get attracted and have a feeling of belonging because of certain monoamines present in your brain which get stimulated through nerve sensors. 3.If you have wondered, why is the sky blue, it is due to a phenomenon called the "Rayleigh scattering", which depends on scattering of light through particles which are much smaller than the wavelength. Hence when light passes through gases, there is scattering and the sky appears blue. 4.Coffee keeps you awake because of the presence of a chemical called adenosine, in your brain. It binds to certain receptors and slows the nerve cell activity when sleep is signaled. 5.Anaerobic fermentation is also a great concept which is present in the chemistry of everyday life. It is present in yogurt, breads, cakes and many other baking products. It is the multiplication of certain useful bacteria which increase the size of the food and make it more filling and soft. 6.Soap is formed by molecules with a "head" which likes water (hydrophilic) and a long chain which hates it (hydrophobic). 7.Lactose is the main complex sugar found in the milk. It's a pretty big compound formed by two smaller components: glucose and galactose. Such a big compound cannot get through the intestinal wall and into the bloodstream, so we need "something" to break it into smaller pieces. This "something" is an enzime named lactase. The more milk and milk products we consume, the more lactase we need. 8.The iodised salt is a necessary intake. It prevents a disease called goitre. 9.In the garden we use sprays to kill insects from attacking our plants. 10.Vermiwash is a liquid fertilizer. It isused as a leaf spray.