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Adolescence: A Stage of Growth and Change - Balanced social life

Grade 7CBSE

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

🔑Concepts

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Adolescence is the transitional period between childhood and adulthood, typically occurring between the ages of 1111 and 1919.

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Puberty marks the beginning of adolescence, characterized by physical changes driven by hormones such as Testosterone\text{Testosterone} in males and Estrogen\text{Estrogen} in females.

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A balanced social life involves managing peer pressure, which is the influence exerted by a peer group on its members to change their attitudes, values, or behaviors.

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Mental and emotional health are as important as physical health; adolescents often experience mood swings and a heightened sense of self-consciousness.

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Maintaining a balanced social life requires effective communication with parents and teachers to bridge the 'generation gap'.

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Digital balance is a crucial part of modern social life, involving the regulation of screen time to ensure it does not interfere with physical activity or face-to-face interactions.

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Nutritional needs increase during this stage. A balanced diet should include CarbohydratesCarbohydrates, ProteinsProteins, FatsFats, VitaminsVitamins, and MineralsMinerals in correct proportions.

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Personal hygiene, such as bathing regularly and managing sweat gland activity, is essential to prevent bacterial infections and maintain social confidence.

📐Formulae

Calculation of full height=Present height (cm)% of full height at this age×100\text{Calculation of full height} = \frac{\text{Present height (cm)}}{\text{\% of full height at this age}} \times 100

Body Mass Index (BMI)=Weight in kg(Height in metres)2\text{Body Mass Index (BMI)} = \frac{\text{Weight in kg}}{(\text{Height in metres})^2}

💡Examples

Problem 1:

A 13-year-old girl is 150 cm150 \text{ cm} tall. According to a growth chart, she has reached 95%95\% of her full height. Calculate her approximate eventual full height.

Solution:

Full Height=15095×100≈157.89 cm\text{Full Height} = \frac{150}{95} \times 100 \approx 157.89 \text{ cm}

Explanation:

By using the growth percentage formula, we divide the current height by the percentage of growth completed and multiply by 100100 to estimate the final adult height.

Problem 2:

If an adolescent weighs 48 kg48 \text{ kg} and has a height of 1.6 m1.6 \text{ m}, calculate their BMI to check if they are maintaining a healthy physical balance.

Solution:

BMI=48(1.6)2=482.56=18.75 kg/m2\text{BMI} = \frac{48}{(1.6)^2} = \frac{48}{2.56} = 18.75 \text{ kg/m}^2

Explanation:

BMI is a measure of body fat based on height and weight. A value of 18.7518.75 is generally considered within the healthy range for many adolescent growth scales.

Problem 3:

In a social group of 2525 students, 1212 students spend more than 44 hours on social media daily. What percentage of the group needs to work on balancing their digital social life?

Solution:

Percentage=1225×100=48%\text{Percentage} = \frac{12}{25} \times 100 = 48\%

Explanation:

To find the percentage, we take the number of students exceeding the recommended limit, divide by the total number of students, and multiply by 100100.

Balanced social life Class 7 Notes & Examples | CBSE Science