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prezentatsiya powerpoint what is chemistry? what is chemistry? chemistry is a science that studies the properties of substances and how substances react with each other. chemistry is the science concerned with the composition, structure, and properties of matter, as well as the changes it undergoes during chemical reactions. chemistry has the task of investigating the materials of which our universe is made. chemistry investigates chemical changes, conditions under which chemical changes occur. chemistry also deals with the way in which similar changes can be brought about in laboratory and on a large scale in industries. who uses chemistry? many people use chemistry as part of their work. cooks use chemistry all the time. they may not have studied chemistry like you, but they learn by experience how to control the changes that happen when food is cooked. doctors use chemistry, because everything that goes on in the human body involves …

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ances’ scientist also use the word ‘substances’. this means a particular type of matter, which you can put a name to. salt is a substance, and so is water. light is not a substance, because it has no mass and volume and it is not matter. elements an element is one of a group of fundamental substances that cannot be broken down into simpler substances. all of the elements have names but each element has been also assigned its own unique symbols, which we will find useful for writing chemical formulas and chemical equations. the names of chemical elements change a little from one language to another, but symbols do not. until the 16th century some elements were named as follow. element name gold sun copper venus tin jupiter mercury mercury silver moon iron mars lead saturn symbolic representations later on symbols were used because of the difficulty for finding …

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es green light in fireworks baso4 is used to take the photos of stomach and intestine physical and chemical changes when we look around, in the world we live, we see some changes. for instance, evaporation of water, rain and snow, spoil of a fruit, drying up of paint on the wall, solidification of cement, fires, dissolving of sugar in tea and rusting iron. there are some events where the changes occur in the chemical structure, but in some events matter changes only physically. therefore, changes in matter may be considered as physical and chemical changes. physical and chemical changes chemical changes changes in the molecular structure of substances are called chemical changes. baking of cake rusting of iron another example in daily life is the souring of milk. it spoils at hot places after a while. that is, there are some changes in its chemical properties. in this event, …

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prezentatsiya powerpoint what is chemistry? what is chemistry? chemistry is a science that studies the properties of substances and how substances react with each other. chemistry is the science concerned with the composition, structure, and properties of matter, as well as the changes it undergoes during chemical reactions. chemistry has the task of investigating the materials of which our universe is made. chemistry investigates chemical changes, conditions under which chemical changes occur. chemistry also deals with the way in which similar changes can be brought about in laboratory and on a large scale in industries. who uses chemistry? many people use chemistry as part of their work. cooks use chemistry all the time. they may not have studied chemistry like …

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