Changes in Materials Quiz - CBSE Class 6 Science

Free practice quiz: Changes in Materials (CBSE Class 6 Science). 19 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. What is an example of a physical change?

   1. Burning paper
   2. Rusting iron
   3. Melting ice
   4. Baking a cake
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   Answer: C. Melting ice

   An example of a physical change is melting ice, as the substance remains the same, just in a different state.

2. If ice melts into water, what type of change is this?

   1. Chemical change
   2. Physical change
   3. Biological change
   4. Nuclear change
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   Answer: B. Physical change

   Melting ice into water is a physical change because it only changes state.

3. When vinegar is mixed with baking soda, what type of change occurs?

   1. Physical change
   2. Chemical change
   3. Biological change
   4. No change
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   Answer: B. Chemical change

   Mixing vinegar with baking soda produces carbon dioxide gas, demonstrating a chemical change.

4. Which item represents a change in state?

   1. Steam from boiling water
   2. Ice melting
   3. Salt dissolving in water
   4. All of the above
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   Answer: D. All of the above

   All options depict changes in state or dissolving processes that alter material forms.

5. What type of reaction occurs when two or more substances combine to make a new substance?

   1. Decomposition
   2. Synthesis
   3. Single replacement
   4. Double replacement
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   Answer: B. Synthesis

   A synthesis reaction involves two or more substances combining to form a new compound.

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