Invention of a Wheel Chapter Notes | EVS for Class 2 PDF Download

What is a Wheel?

Think about all the things around you that use wheels—cars, bikes, even shopping carts! How would life be without them? Moving things would be much harder, right? The wheel has made it much easier to transport things quickly and with less effort. Let's explore how this simple invention has helped shape the world.

Wheel is a circular object that helps in moving things across the ground. The invention of the wheel is one of the most important developments in human history, as it has greatly impacted transportation and trade. Wheels are commonly found in various everyday items, such as cars, bicycles, carts, and toys.

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Early Inventions

Before the Invention of Wheels

• Before wheels were created, people used various methods to move heavy objects.
• One such method involved rolling logs under items, which made the process slow and challenging.
• People also utilized simple wooden carts, which were flat platforms that glided on the ground.
• Additionally, they sometimes dragged items directly along the ground, requiring a lot of effort.

The Invention of the First Wheels

• The earliest wheels were crafted for pottery over 5,000 years ago.
• In those ancient times, these wheels were heavy and not as functional as the wheels we have today.
• The creation of the wheel marked a significant technological advancement.
• It facilitated easier movement of objects, boosted trade, and sparked a wave of new ideas and inventions.

How Wheels Work?

(i) Round Shape

• The round shape of a wheel is fundamental because it enables smoother rolling. Rolling is inherently easier than sliding, which enhances the movement of objects.
• This design feature not only conserves energy but also reduces effort, making it more manageable to transport heavy loads.

(ii) Axle and Wheel

• The wheel is firmly attached to a central rod called the axle, which facilitates the wheel's rotation.
• Wheels are instrumental in the movement of various vehicles, playing a vital role in transportation.

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Importance of Wheels

• Wheels made travel faster and easier, helping people go longer distances and carry more things.
• This improvement helped in trade, talking to others, and building better cities.
• The invention of the wheel led to the making of carts, cars, and bicycles, making life simpler.
• These vehicles helped people move quickly and transport goods easily.
• Because of wheels, people from faraway places could connect and trade with each other.

Evolution of the Wheel

The wheel is a crucial invention in history that greatly facilitated travel and the movement of goods.

Early Developments: Initially, wheels were made of solid wood, which made them heavy. Over time, they were improved by adding spokes, making them lighter and stronger.

Modern Advancements: Today, wheels are used in a wide range of applications, from small toys to large machinery. They are designed to be durable and operate smoothly, significantly impacting daily life and trade.

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Summary

• The invention of the wheel was a significant advancement that greatly facilitated travel for people.
• It not only made travel faster but also enabled the transportation of heavier loads with greater ease.
• With the introduction of wheels, moving large and heavy objects became significantly simpler and more efficient.