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     Why do changes occur around us? Explain it with examples.

    Changes occur everywhere, every moment around us. Everything in the world is subject to change.  Chemical changes: That change the chemical composition of the material.Physical change: That  are temporary and do not change the chemical composition of the material. They change only the state, colour, and texture.Reversible chages: They can be reversed.Irreversible changes: They cannot be  reversed. Eg  -Bread going into toaster-becoming toast.-Boiling eggs.-Boiling Rice and Lentils.-Turning Milk into Yoghurt.-Making Tea.-Henna drying on your hands.-Nail varnish drying on your hands.-Butter melts
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    Changes occur around us continuously. Sometimes these changes are spontaneous while sometimes these changes are introduced. Physical changes are the changes only in the physical properties of a substance is often reversible. Chemical changes bring about a change in the chemical composition of a substance and in most cases are irreversible.

    An example of a physical change is the change in the state of water from ice to liquid water to steam.

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