The melting of an ice cube in a glass of water is an example of a

Rationale

The melting of an ice cube in a glass of water is an example of a physical change.

When an ice cube melts, it transitions from a solid state to a liquid state without altering its chemical composition. This process exemplifies a physical change because the molecules remain the same, just rearranging from a structured form to a more fluid one, reflecting changes in state rather than in substance.

A (physical change) CORRECT

This choice accurately describes the melting of ice, as it involves a change in state from solid to liquid while retaining the molecular structure of water (H2O). Physical changes are characterized by alterations in form or state that do not affect the chemical identity of the substance, making this answer correct.

B (chemical reaction) YOUR ANSWER

A chemical reaction involves the transformation of substances into different products through breaking and forming chemical bonds. In the case of melting ice, no new substances are created; the ice simply changes form. Thus, this option incorrectly suggests a change in chemical identity, which does not occur during melting.

C (metabolic process) YOUR ANSWER

Metabolic processes refer to the chemical reactions that occur within living organisms to maintain life, including catabolism and anabolism. The melting of ice is a physical phenomenon that does not involve biological functions or chemical reactions occurring within an organism, making this choice irrelevant to the question.

D (decay mechanism) YOUR ANSWER

Decay mechanisms typically refer to processes involving the breakdown of organic matter or radioactive substances over time. The melting of an ice cube does not involve decomposition or breakdown but rather a physical change in state. Therefore, this answer is not applicable in the context of the question.

Conclusion

The melting of an ice cube illustrates a physical change, as it involves a transition between solid and liquid states without altering the chemical structure of water. In contrast, the other choices represent processes that either involve chemical identity changes or are unrelated to the physical state changes observed in the melting of ice. This distinction underscores the importance of understanding physical versus chemical transformations in various contexts.

The melting of an ice cube in a glass of water is an example of a

The melting of an ice cube in a glass of water is an example of a physical change.

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