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What is meant by colour of an object?

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By following which safety rules we should be safe and sound from electric shock?

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Why do we use woolen clothes and blankets during winter days?

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What is meant by normal?

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Describe simple process for manufacturing of plastics.

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What is meant by purification of water?

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Why clear swimming pools look shallower than their actual depth?

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Design an activity to observe conduction.

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How do we see a mirage?

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How refraction take place?

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Why do we use periscope?

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Describe the formation of rainbow?

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What are the types of change?

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Describe the refraction in different mediums?

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Construct a food chain with three links?

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What the colours scheme of rainbow?

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What is meant by total internal reflection?

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What are primary colours?

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Define refraction?

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What is meant by conduction?

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