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Health and Hygiene - Personal hygiene and cleanliness

Grade 3ICSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

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Health is a state of complete physical and mental well-being, while hygiene refers to practices that lead to good health and cleanliness.

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Personal hygiene involves keeping the body clean by bathing daily, brushing teeth twice a day, and washing hair regularly.

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Hand hygiene is crucial: Hands should be washed with soap and clean H2OH_2O before and after meals, and after using the toilet.

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Germs are tiny microorganisms that cause diseases; they spread through dirty hands, contaminated food, and H2OH_2O.

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Maintaining short and clean nails prevents dirt and germs from entering our bodies when we eat.

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Oral hygiene involves brushing to remove food particles and prevent the growth of bacteria that cause cavitiescavities.

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A healthy lifestyle includes balanced nutrition, regular exercise, and approximately 9−119 - 11 hours of sleep for children.

📐Formulae

Hygiene+Balanced Diet+Exercise=Good Health\text{Hygiene} + \text{Balanced Diet} + \text{Exercise} = \text{Good Health}

Soap+H2O+Scrubbing→Germ-free Hands\text{Soap} + H_2O + \text{Scrubbing} \rightarrow \text{Germ-free Hands}

Total Sleep Needed≈10 hours per day\text{Total Sleep Needed} \approx 10 \text{ hours per day}

💡Examples

Problem 1:

If a student goes to bed at 9:00 PM9:00\text{ PM} and wakes up at 7:00 AM7:00\text{ AM}, how many hours of rest did they get?

Solution:

10 hours10\text{ hours}

Explanation:

The duration from 9:00 PM9:00\text{ PM} to midnight is 3 hours3\text{ hours}, and from midnight to 7:00 AM7:00\text{ AM} is 7 hours7\text{ hours}. Therefore, 3+7=10 hours3 + 7 = 10\text{ hours}.

Problem 2:

Why is it recommended to drink filtered or boiled H2OH_2O?

Solution:

To kill germs and remove impurities.

Explanation:

Boiling H2OH_2O at 100∘C100^\circ C ensures that most disease-causing microorganisms are destroyed, making it safe for consumption.

Problem 3:

Identify the primary substance used to maintain dental hygiene.

Solution:

Fluoride toothpaste and a toothbrush.

Explanation:

Brushing removes plaque and food debris, while the fluoride in toothpaste helps strengthen the tooth enamel.