Table of Contents
What is a change give 3 examples of changes?
Changes in the size or form of matter are examples of physical change. Physical changes include transitions from one state to another, such as from solid to liquid or liquid to gas. Cutting, bending, dissolving, freezing, boiling, and melting are some of the processes that create physical changes. Some common examples of physical changes are: melting, freezing, condensing, breaking, crushing, cutting, and bending. Processes such as melting, boiling, evaporation, freezing, condensation, dissolution are reversible changes. A few examples are melting of wax, freezing of ice, and boiling water which evaporates as steam and condenses back to water. Dissolving, melting, and folding is examples of a reversible process. The burning of a substance is an irreversible process. For example: Melting of ice, Folding of chapati dough. For example: Cooking, Frying, etc. Examples of Phase Changes For example, you have probably witnessed freezing, melting, and vaporization just by making ice, melting ice, and boiling water. Condensation often occurs on the outside of cold beverage containers. This is when the humid air changes directly to a liquid on the surface of the container.
What are the two types of changes explain with some examples?
Changes can be of two types, physical and chemical. Physical changes are changes in the physical properties of substances. No new substances are formed in these changes. These changes may be reversible. Burning is an example of an irreversible change. When you burn wood you get ash and smoke. You cannot change the ash and smoke back to wood again. Some examples of irreversible changes are burning of paper, Burning of fuels (like Wood, Coal and LPG), Cooking of food, Rusting of iron , Grinding of wheat grains into flour, Baking of chapatti (roti), Growth of a plant, Formation of flower from bud, Falling of leaves from a tree, Ripening of fruits, Ageing of man and … Ironing removes the wrinkles of the clothes, which can come back in the same condition. Hence, ironing of a cloth is a reversible change.