Which of the following equations represents a chemical reaction? *
O Water freezing
O Ice melting
O Water boiling
O Burning
Burning fuel inside of an engine

The correct answer is "Burning fuel inside of an engine." This is an example of a chemical reaction because it involves the rearrangement of atoms to create new substances. In this case, the fuel is reacting with oxygen in the air to produce heat, light, and various gaseous byproducts such as carbon dioxide and water vapor. By contrast, the other options are examples of physical changes, which involve changes in the state or appearance of a substance without changing its chemical composition.

Which of the following equations represents a chemical reaction? * O Water freezing O Ice melting O Water boiling O Burning Burning fuel inside of an engine

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Which of the following equations represents a chemical reaction? *
O Water freezing
O Ice melting
O Water boiling
O Burning
Burning fuel inside of an engine