Physical Change Versus Chemical Change

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Physical Change Versus Chemical Change - Quiz

Test your knowledge of your physical and chemical scientific studies with this physical change versus chemical change quiz!


Questions and Answers
  • 1. 

    What occurs during a chemical change?

    • A.

      The substance dissolves

    • B.

      The substance changes color

    • C.

      The substance's composition changes

    • D.

      The substance changes smell

    Correct Answer
    C. The substance's composition changes
    Explanation
    During a chemical change, the substance undergoes a transformation in its composition. This means that the arrangement and bonding of atoms in the substance are altered, resulting in the formation of new substances with different properties. This change is often accompanied by other observable effects such as a change in color, smell, or the dissolution of the substance. However, the key characteristic of a chemical change is the alteration of the substance's composition.

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  • 2. 

    What occurs during a physical change?

    • A.

      The substance changes in appearance, smell, or any other outer change.

    • B.

      The substance changes its internal structure

    • C.

      The substance's composition changes drastically

    Correct Answer
    A. The substance changes in appearance, smell, or any other outer change.
    Explanation
    During a physical change, the substance undergoes a transformation in its physical properties, such as appearance, smell, or any other outer change. This means that the substance may change its state of matter, shape, size, or other observable characteristics, but its internal structure and composition remain the same.

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  • 3. 

    Is the following a physical or chemical change? Bread rising.

    • A.

      Physical change

    • B.

      Chemical change

    • C.

      Neither

    Correct Answer
    B. Chemical change
    Explanation
    Bread rising is a chemical change. During the process of bread rising, yeast in the dough undergoes fermentation, converting sugars into carbon dioxide gas. This gas gets trapped in the dough, causing it to expand and rise. The chemical composition of the dough is altered as a result of this reaction, making it a chemical change rather than a physical one.

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  • 4. 

    Is the following a physical or chemical change? Whipping egg whites.

    • A.

      Physical change

    • B.

      Chemical change

    • C.

      Neither

    Correct Answer
    A. Physical change
    Explanation
    Whipping egg whites is a physical change because it does not involve the formation of any new substances. When egg whites are whipped, air is incorporated into them, causing the proteins in the egg whites to denature and form a foam-like structure. However, the chemical composition of the egg whites remains the same. Therefore, this process does not result in the formation of new substances and is considered a physical change.

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  • 5. 

    Is the following a physical or chemical change?Dissolving sugar into water.

    • A.

      Physical change

    • B.

      Chemical change

    • C.

      Neither

    Correct Answer
    A. Physical change
    Explanation
    Dissolving sugar into water is a physical change because it does not involve a chemical reaction. In this process, the sugar molecules are dispersed throughout the water, forming a homogeneous mixture. The chemical composition of both the sugar and water remains the same, only the physical state of the sugar changes from solid to dissolved. No new substances are formed, indicating that it is a physical change rather than a chemical change.

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  • 6. 

    Is the following a physical or chemical change? Gasoline burning.

    • A.

      Physical change

    • B.

      Chemical change

    • C.

      Neither

    Correct Answer
    B. Chemical change
    Explanation
    Gasoline burning is a chemical change. When gasoline burns, it undergoes a chemical reaction with oxygen in the air, resulting in the production of carbon dioxide, water vapor, and heat. This change is irreversible, as the original gasoline molecules are transformed into new substances. Therefore, it is considered a chemical change rather than a physical change, which refers to a change in the physical properties of a substance without altering its chemical composition.

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  • 7. 

    If the substances changes in color, texture, or temperature, is this a physical or chemical change?

    • A.

      Physical

    • B.

      Chemical

    • C.

      Neither

    Correct Answer
    A. Physical
    Explanation
    When a substance changes in color, texture, or temperature, it is considered a physical change. This is because these changes do not alter the chemical composition or the identity of the substance. Physical changes only affect the physical properties of the substance, such as its appearance or state of matter. In this case, the change in color, texture, or temperature is reversible and does not involve a chemical reaction.

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  • 8. 

    Is a change in state (solid, liquid, etc...) a physical or chemical change?

    • A.

      Physical change

    • B.

      Chemical change

    • C.

      Neither

    Correct Answer
    A. Physical change
    Explanation
    A change in state, such as from solid to liquid or liquid to gas, is considered a physical change because it does not involve a change in the chemical composition of the substance. In a physical change, the molecules or atoms rearrange themselves, but their fundamental structure remains the same. This is different from a chemical change where new substances with different chemical properties are formed. Therefore, a change in state is classified as a physical change.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 14, 2015
    Quiz Created by
    Plankpopular
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