Which is a chemical change?

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Prepare for the Abeka Science Matter and Energy Test 7. Utilize flashcards and multiple choice questions with detailed explanations to boost your comprehension and succeed in your exam!

Multiple Choice

Which is a chemical change?

Explanation:
A chemical change happens when a substance reacts to form new substances with different properties. Burning wood is a chemical change because the wood reacts with oxygen during combustion to create new substances such as carbon dioxide, water, and ash, and energy is released. The other processes don’t produce new substances: melting ice is just water changing from a solid to a liquid; dissolving sugar in water is mainly a physical mixing where the sugar disperses but remains the same substance; condensation of water is a gas turning into liquid water without forming new compounds.

A chemical change happens when a substance reacts to form new substances with different properties. Burning wood is a chemical change because the wood reacts with oxygen during combustion to create new substances such as carbon dioxide, water, and ash, and energy is released. The other processes don’t produce new substances: melting ice is just water changing from a solid to a liquid; dissolving sugar in water is mainly a physical mixing where the sugar disperses but remains the same substance; condensation of water is a gas turning into liquid water without forming new compounds.

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