Experts have designed these Class 7 Science Notes Chapter 1 The Ever Evolving World of Science Class 7 Notes for effective learning.
Class 7 Science Chapter 1 The Ever Evolving World of Science Notes
Class 7 The Ever Evolving World of Science Notes
Class 7 Science Chapter 1 Notes – The Ever Evolving World of Science Notes Class 7
→ This lesson introduces you to the ex¬citing journey of science. Science is not just about learning facts—it’s about being curious, asking questions, and exploring the world around you.
→You explore the tiny (like cells) and the huge (like the Sun and stars), study changes in materials and our own bodies, and understand how everything in nature is connected. Through fun experiments and thinking like a scientist, we can discover how things work and why they happen.
→ Science = Curiosity + Questions
→ Science begins with asking why, how, and what if.
→ Even a paper plane or a butterfly can inspire scientific discovery.
→ From a leaf to the stars, science helps us understand the world— both big and small.
→ Big inventions often start from small ideas—like watching birds helped invent airplanes. ,
→ Batteries run out, ice melts, fruits ripen, rocks break—these are all scientific changes.
→ Some changes (like melting ice) can be reversed. Others (like ripening fruit) cannot be reversed. Just like the environment, our bodies change, especially during middle school.
→ Physics, chemistry, biology, and earth science are all linked together.
→ Before clocks, people used shadows to tell time.
→ Light and shadows help us understand day, night, and even eclipses.
→ Don’t just find answers—also ask good questions.
→ Sometimes asking questions is more important than answering them.
→ Learn, experiment, and imagine new possibilities!
→ Ask questions like: “Why are some fruits sour?” or “Why does haldi leave a yellow stain?”
→ Science: The study of the world around us through observation, experiments, and asking questions.
→ Observation: Looking carefully at something to learn about it.
→ Experiment: A test done to discover how something works or to prove an idea.
→ Reversible Change: A change that can be undone or changed back to its original form.
Example: Ice melting into water.
→ Irreversible Change: A change that cannot be undone. Example: Ripening of a fruit.
→ Curiosity: The desire to learn or know more about something.
→ Shadow: A dark area made when something blocks light.
→ Chemical Change: A change where a new substance is formed. Ebcample: Haldi (turmeric) leaving a stain on clothes.
→ Physical Change: A change in shape, size, or state, but no new substance is formed.
Example: Tearing paper.
→ Growth: The process of becoming bigger or more developed.
Example: Plants, animals, and humans grow over time.
→ Nature: Everything found in the world that is not made by humans (like trees, rivers, animals).
→ Innovation: A new idea or way of doing something better.
Example: Inventing airplanes by studying birds.
→ Inquiry: Asking questions to explore and learn more.
→ Biology: The study of living things like plants and animals.
→ Physics: The study of matter, energy, and how things move.
→ Chemistry: The study of substances and how they change.
→ Earth Science: The study of Earth, including land, water, and weather.
→ Change: When something becomes different from before.