Physical changes are transformations that alter the form or appearance of a substance without changing its chemical composition. These changes are usually reversible, such as melting, freezing, or dissolving, and do not result in the formation of new substances.

Physical Changes

Physical changes

Transformations refer to operations that alter the form, appearance, or structure of something, often used in mathematics and science to describe changes in position, shape, or size while preserving certain properties. They are fundamental in understanding symmetry, geometry, and the behavior of functions and systems across various domains.

transformations

form or appearance

Chemical composition refers to the identity and relative number of the elements that make up any particular compound or substance. Understanding chemical composition is crucial for determining the properties and potential reactions of a substance, which is essential in fields such as chemistry, materials science, and pharmacology.

chemical composition

Reversible changes are changes that can be undone, like when you melt ice and then freeze it back into ice again. These changes don't make new things and can go back to how they were before, like when you stretch a rubber band and let it go back to its shape.

Reversible Changes

Melting is the process by which a solid turns into a liquid when its temperature reaches the substance's melting point. This phase transition occurs when the particles in the solid gain enough energy to overcome their fixed positions, allowing them to move more freely and form a liquid state.

melting

Freezing is the process through which a liquid turns into a solid when its temperature is lowered below its freezing point. This phase transition is crucial in various natural and industrial processes, including the preservation of food and the formation of ice in the environment.

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