Chemical Reactions

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What is a physical change?

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A physical change is a change that results in no new substances being formed. Examples include changes in state, such as melting or freezing.

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What is a chemical change?

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A chemical change is a change that results in the formation of new substances. Examples include burning, rusting, and cooking.

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What is an example of a physical change?

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Freezing water is an example of a physical change.

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What is a catalyst?

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A catalyst is a substance that speeds up a chemical reaction without being consumed in the process.

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What are properties of matter?

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Properties of matter include characteristics such as magnetism, color, odor, density, and state (solid, liquid, gas).

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Who studies chemical reactions to form new materials?

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A materials scientist studies chemical reactions to form new materials.

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What happens during a chemical reaction?

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During a chemical reaction, reactants are transformed into products, resulting in new substances with different properties.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

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What is an example of a chemical change?

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Burning wood is an example of a chemical change.

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What is rusting?

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Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide.