Question

what is change of state of matter

Answer 1

All matter exists as solids, liquids, or gases. These are called the states of matter. Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas). This change is called BOILING. The particles of ice, water, and steam are identical, but arranged differently.

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SOLID PARTICLES

When solid, the particles of a substance are tightly packed together, making it rigid. A substance can change from a solid state to a liquid state, and from a liquid state to a solid state.






LIQUID PARTICLES

The particles in a liquid can move past one another. This allows liquids to flow. A substance in a liquid state can change to a solid state and also to a gas state.







GAS PARTICLES

Particles in a gas are spread out and free to move around. This is why gases fill all the space around them. A substance that is a gas can change to a liquid, and a liquid substance can change to a gas.

Answer 2

All matter exists as solids, liquids, or gases. These are called the states of matter. Matter can change from one state to another if heated or cooled. If ice  is heated it changes to water . This change is called MELTING. If water is heated, it changes to steam.