NCERT Class 7 Science Curiosity Chapter 01 The Ever Evolving World of Science PDF Download

Chapter 1: The Ever-Evolving World of Science

We hope you enjoyed your adventures with Curiosity in Grade 6, and are now ready to continue our journey into the wonderful world of science. This again, is not just a textbook with facts - it is an invitation to question, to perform experiments, and to explore, as we try to understand the beautiful world we live in. The world of science covers everything - small and large, near and far. We may be looking at tiny cells inside a leaf, or the movement of the sun and the stars. We may be testing out the materials around us at home, or discussing how water flows underground. As you go through the chapters in this book, you will start new adventures that challenge your thinking, expand your knowledge, and help you become an explorer, making small discoveries for yourself.

Before we dive into our exciting journey, take a moment to observe something special about this book. Look at the page numbers - they follow the playful flight of a butterfly and the soaring of a paper plane! Just as a butterfly flutters freely and a paper plane flies into the sky, learning takes flight when curiosity leads the way. Did you know that something as simple as a paper plane inspired real scientific explorations of flight? From early inventors studying bird wings to modern engineers designing aircraft, the dream of flying started with simple observations and experiments. So, as you turn each page, let your imagination take flight - exploring new ideas, discovering wonders, and reaching for the skies!

Teacher's Note

Notice how this book connects to your real life right from the start. When you ask "why are some fruits sour?" or "what happens when we wash a haldi stain?", you are already thinking like a scientist. The chapters ahead will show you how to find answers to these everyday questions through careful observation and simple experiments.

Exploration, of course, isn't just about discovering new facts or learning about different things in nature. Science, as we said in Grade 6, is a process, so it is about a way of thinking that welcomes curiosity, asks questions, and is open to the unknown. In Grade 7, we will try to ask deeper questions: How do things work? Why do events happen the way they do? And what can we learn from the patterns that we see in nature?

To do this, we have to step out of this book, step out of the classroom perhaps, and experience the world through activities and experiments. These are experiences that we hope will not just be interesting or exciting but also serve as stepping stones to a deeper understanding of the environment we live in and of our place on this planet. We believe that this will also help you to see science as an ongoing process of discovery. And not just about discovery alone, but also about responsibility. As young science explorers, you will soon see how human activities are linked to what happens in the natural world and are connected to the society we live in. You will, we hope, also see the role that science can play in addressing environmental challenges and help in creating a more sustainable world.

But let's get back into this book for now. You will read about topics in different fields of science, from physics and chemistry to biology and earth sciences. While they might appear as different chapters, just as we had said in Grade 6, they are all interconnected. Scientific ideas in one area often inspire discoveries in another, or at least allow us to ask questions in another area. So, let's take a quick journey through our book for this year. We will start by looking at the properties of materials around us, mostly the things we experience but perhaps never ask questions about - why are some fruits sour? What happens when we wash a haldi stain on our school uniform?

We then move on and play with some electric batteries, lamps and wires to try to find other kinds of properties of materials. What kind of materials do we need to make a lamp glow? This will lead us to classifying materials based on their properties - and we will enter the world of metals and non-metals. We know from our experience that a torch battery runs out eventually, and can't be used again. We'll explore what kind of changes happen around us. Some changes can be reversed and others cannot be reversed.

Teacher's Note

When you work with batteries and lamps, pay attention to which materials allow the bulb to light up and which don't. This is not random - it depends on a real property of the material. Write down your observations carefully, because later you will group materials by this property and discover the difference between conductors and insulators.

Batteries run out, ice melts into water, fruits ripen, rocks break into pebbles... what kind of changes are these? Some of these happen, or happen faster, when things are heated. We will look at how heat flows - whether it is the melting of an ice cube in a glass, or the melting of a glacier. Water is, of course, everywhere, and with the heat from the Sun, it evaporates from the seas and falls as rain, perhaps trickling down into the ground, somewhere far away.

Key Points

• Science is not just about facts; it is a way of thinking that involves curiosity, asking questions, and being open to the unknown.
• In Grade 7, you will explore properties of materials, types of changes, electricity, and how heat and water move through our world.
• Scientific ideas from different fields are connected and often inspire discoveries in other areas.
• As a young science explorer, you have the responsibility to understand how human activities affect the natural world and how science can help solve environmental problems.

This is a preview of the first 3 pages. To get the complete chapter, click below.