What are periodic and non-periodic changes? Explain with examples.
Is a forest fire a periodic or a non-periodic change? [4 Marks]

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Solution

Periodic changes are the changes that repeat themselves after a fixed interval of time. [1 Mark]
Example - Change of season, day and night cycle, heart beat. [1 Mark]

Non-periodic changes are the changes that do not repeat themselves after a fixed interval of time. [1 Mark]
Example - Tornado, volcanic eruption, tsunami, etc. (most natural disasters).[1 Mark]

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What are periodic and non-periodic changes? Explain with examples. Is a forest fire a periodic or a non-periodic change? [5 MARKS]

Question 4.

(i) What are periodic changes? Explain with examples.

(ii) Is a forest fire a periodic or a non-periodic change?

Define the following with suitable examples.

(i) Natural and Manmade change

(ii) Periodic and Non periodic change

(iii) Temporary and Permanent change

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