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Earth—Our Shared Home - Vasudhaiva Kutumbakam: One Earth, One Family

Grade 5CBSE

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

🔑Concepts

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Vasudhaiva Kutumbakam: An ancient Indian philosophy meaning 'The World is One Family', emphasizing that all living beings on Earth are interconnected and share a common home.

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Earth's Composition: Earth is the only known planet to support life due to the presence of water (H2OH_2O), an oxygen-rich atmosphere (O2O_2), and a suitable temperature range.

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Atmospheric Layers: The atmosphere consists of layers like the Troposphere, Stratosphere (containing the ozone layer or O3O_3), Mesosphere, Thermosphere, and Exosphere.

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Interdependence: Plants produce oxygen through photosynthesis and animals exhale carbon dioxide (CO2CO_2), creating a vital cycle for survival.

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Natural Resources: These are divided into Renewable resources (Solar, Wind, Water) and Non-renewable resources (Coal, Petroleum, Natural Gas).

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Global Warming: The gradual increase in Earth's average temperature caused by the greenhouse effect from gases like CO2CO_2 and CH4CH_4 (Methane).

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The 3Rs: To protect our shared home, we must follow Reduce, Reuse, and Recycle to manage waste effectively.

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Conservation of Water: Only about 3%3\% of Earth's water is freshwater, and less than 1%1\% is accessible for human use.

📐Formulae

6CO2+6H2O→Sunlight/ChlorophyllC6H12O6+6O26CO_2 + 6H_2O \xrightarrow{\text{Sunlight/Chlorophyll}} C_6H_{12}O_6 + 6O_2

Freshwater Availability<1% of total water supply\text{Freshwater Availability} < 1\% \text{ of total water supply}

Earth’s Surface Area≈71% Water+29% Land\text{Earth's Surface Area} \approx 71\% \text{ Water} + 29\% \text{ Land}

💡Examples

Problem 1:

If the total surface area of Earth is approximately 510510 million square kilometers and 29%29\% of it is land, calculate the approximate area of land using the formula: Land Area=Total Area×29100\text{Land Area} = \text{Total Area} \times \frac{29}{100}

Solution:

Land Area=510×0.29=147.9 million km2\text{Land Area} = 510 \times 0.29 = 147.9 \text{ million km}^2

Explanation:

To find the land area, we multiply the total surface area by the percentage of land. This shows that a relatively small portion of our shared home is habitable land.

Problem 2:

A school society collected 8,0008,000 kg of plastic waste for recycling. If 3,4563,456 kg was processed in the first month, how much waste is left? Perform the vertical subtraction.

Solution:

8000−34564544\begin{array}{r} 8000 \\ - 3456 \\ \hline 4544 \end{array}

Explanation:

Subtracting the processed waste from the total collected waste gives us the remaining 4,5444,544 kg of plastic to be recycled.

Problem 3:

If one large tree produces enough oxygen (O2O_2) for 44 people every day, how many people can 2525 trees support?

Solution:

25×4=100 people25 \times 4 = 100 \text{ people}

Explanation:

By planting more trees, we increase the oxygen supply for our global family, demonstrating the concept of interdependence.