In this chapter, we study how to use letters like a, b, c to represent unknown numbers and create mathematical expressions with them. This topic forms the foundation for higher-level algebra and helps students understand patterns, relationships, and problem-solving in a much easier way. The Notion of Letter-Numbers Introduction to Letter-Numbers Letter-numbers are basically letters […]
In our daily life, we often need to measure things more precisely than just using whole numbers. When a carpenter needs to cut wood exactly or when we buy 1.5 kg of vegetables, we use parts of units. This chapter will help you understand how to work with these fractional parts using decimals, which makes
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Mathematics can be really fun when you understand how numbers work together. Today we will study arithmetic expressions – which are basically mathematical sentences that tell us how to combine numbers. 2.1 Simple Expressions Definition and Value Arithmetic expressions are like mathematical phrases that we see everywhere. Think of expressions like 13 + 2, 20
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Large numbers like lakh and crore are very common in our daily life in India. You must have heard people talking about one lakh rice varieties or population of cities in lakhs and crores. But what does one lakh actually mean? How big is this number really? A farmer once heard that there were one
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In our daily life, we see various geometric shapes beyond the common squares and rectangles, each requiring different methods to calculate their perimeter and area. When dealing with situations such as finding the perimeter of a boundary or calculating the area of a parallelogram-shaped piece of land, we need specific methods to find accurate measurements.
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Pre-Space Age Foundation 1945-1960: Early Visionaries India’s space journey begins with Dr. Vikram Sarabhai’s vision for peaceful space applications and Dr. Homi Bhabha’s atomic energy program laying the foundation for space technology. Global Space Age Begins (1950s-1960s) 1957 – Soviet Union launches Sputnik 1, the first artificial satellite, starting the Space Race. 1961 – Yuri
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Nationalism in India represents one of history’s most significant anti-colonial struggles, spanning nearly a century of organized resistance against British rule. This timeline traces the evolution of Indian nationalism from its early roots in the mid-19th century through to independence in 1947, highlighting key events, personalities, and movements that shaped the nation’s journey to freedom.
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Earth is always motion in two different ways. It spins around like a top, and it also travels around the Sun in a big circle. These movements of Earth cause many changes that we see in the sky every day. In this chapter, we will study how Earth moves and how this movement affects what
Light is all around us and plays a very imp role in our daily life. Have you ever seen fireflies glowing in the dark? These tiny insects use light to talk to each other at night. But sadly, because of light pollution in cities, we see fewer fireflies these days. When we look at the
Life processes are imp for animals to survive. These include: Different animals eat different foods, and their digestion and breathing methods vary. Let’s study how these processes work! Nutrition in Animals Animals eat foods like grass, meat, or nectar. Food contains: But food is complex, so it must be broken into simpler forms for the
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Time measurement is imp in our daily life and sports. From school races to catching a bus, we rely on clocks and watches. Modern devices like stopwatches, mobile phones, and wall clocks give us accurate time. Even visually impaired people use Braille or talking watches. But how did people measure time in ancient days? Let’s
Heat transfer happens in many different ways in nature. Understanding these processes helps us know why certain things happen around us – like why we feel warm near a fire or why coastal areas have pleasant weather. The Sun is our main source of heat and light on Earth. You must have noticed that places
Heat Transfer in Nature Class 7 Curiosity Free Notes and Mind Map (Free PDF Download) Read More »
Adolescence happens from ages 10 to 19 and its a time when your body grows really fast. During this period, your body starts preparing itself for adulthood. Humans cannot reproduce right after birth – we need to mature first just like those plants. Growing With Age: The Teenage Years Adolescence usually starts around age 10
Every day we see so many changes happening around us. If we look carefully, we can notice these changes everywhere in our daily life. When we take ice cubes from the freezer, they slowly melt and become water. This shows us a change in state from solid to liquid. In our garden, we can see
