Physical and Chemical Changes

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What is a chemical change?

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A chemical change is a process where one or more substances are transformed into new substances with different properties.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What happens to wood when it burns?

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When wood burns, a chemical change takes place, resulting in the formation of ash, smoke, and gases.

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What is evidence of a chemical change?

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Evidence of a chemical change includes temperature change, light production, gas formation, and color change.

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Is squeezing oranges to make juice a physical or chemical change?

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Squeezing oranges to make juice is a physical change because the chemical composition of the juice remains the same.

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What is an example of a chemical change?

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An example of a chemical change is rust forming on iron when it reacts with oxygen and moisture.

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What is an example of a physical change?

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An example of a physical change is melting ice into water.

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What indicates a temperature change in a reaction?

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A temperature change indicates that a chemical change may have occurred, as energy is either absorbed or released.

Front

What does it mean if a gas is produced during a reaction?

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The production of gas during a reaction is evidence of a chemical change, indicating that new substances are formed.

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What is color change an indicator of?

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Color change can indicate a chemical change, as it often signifies the formation of new substances.