Question

which of the following changes will show expansion


1.burning of paper

2.heating of wood

3.heating of sand

4.heating of iron​

Answer 1

Answer: The following changes show expansion-

Heating of wood.

Heating of sand.

Heating of iron.

Answer 2

4. Heating of iron changes will show expansion.

Explanation:

• Expansion is a process in which an object becomes bigger in size.
• Basically, it is a process by which an object expands and becomes larger due to the change in its temperature.
• It occurs due to many reasons such as temperature.
• At a higher temperature the molecules are moving faster on average, which makes them to take up more space.
• In Expansion, the space between the particles also that changes.
• For e.g metals expand on heating.
• Here, Heating of iron shows an expansion as it becomes bigger when heated.
• Hence, the correct answer among all the options is option 4. Heating of iron .

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