Chemistry has existed for a very long time. Chemistry is that branch of physical science that studies the composition, properties, energy and behavior of matter. It is said that chemistry has existed since prehistoric times. This was in the form of everyday objects such as pottery, cosmetics and perfumes and the extraction of metals from ores. Chemistry is based on the discovery and study of elements. Some elements were known to ancient man, but most were discovered by chemists and alchemists. Some say that chemistry began at the beginning of the Stone Age, when man created fire. Chemistry is the study of the chemical composition and properties of matter and its reactions. The study of any living thing involves chemistry. Without famous chemists such as Dmitri Mendeleev, Antoine Laurent de Lavoisier, Albert Einstein, John Dalton and other great chemists we would be unaware of the wonderful, confusing and much needed world of chemistry. Before the chemical society did not know the elements, it did not know substances such as acids and metals, or the difference between gold and lead. There are many simple things that would remain unknown if chemistry were not as advanced as it is today. Chemistry is important in everyday life, because everything is made of chemicals. The chemistry is out with the leaves changing color in the fall. The supplies used to carry out household chores are made up of chemicals. Chemistry is literally in everything, from the food you eat to the air you breathe. It's in your soap, in your emotions, and in everything you can see or touch. Antoine Laurent Lavoisier is considered the father of modern chemistry. He had a major impact on the way the world views chemistry today. From identifying the elements to discovering... half the paper... it hasn't always been put to good use. It can be used for harmful things, for example carbon monoxide has always been one of the most harmful poison gases to use. Carbon monoxide is an odorless, colorless and toxic gas. Some symptoms of carbon monoxide exposure are flu, headache, nausea, dizziness and disorientation. Carbon monoxide is present in many of the household appliances we use every day, such as gas stoves, tobacco smoke, generators, gas stoves, cars, buses and other vehicles. Carbon monoxide can be very harmful to humans if excessively exposed, at moderate levels it can cause angina, blindness and reduced brain function. Chemistry is in everything we do. We need chemistry to survive and our future depends on it. Without chemistry the world would not be as advanced as it is today. Chemistry and all other sciences are the building blocks of life.