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c7Scich1no NCERT GUIDE CLASS 7

Chapter 1. The Ever-Evolving World of Science

NCERT CLASS-7 GUIDE
Notes in a Nutshell

  1. Science as a Journey of Exploration.
    - Science studies both the tiny or microscopic world (like cells, atoms, microbes) and the vast cosmic world (stars, planets, galaxies, and universe).
    - It connects everyday experiences with cosmic phenomena, making us explorers of both the near and far.
    - Learning science is not just about facts — it is about adventure, curiosity, and discovery.
  2. Curiosity Sparks Discovery.
    - Even simple activities, like folding a paper plane, can lead to big ideas.
    - A simple paper plane is more than just play, it demonstrates the basic principles of flight such as lift, drag, and thrust. Early scientists and inventors observed how paper planes glide through air, which inspired them to study air resistance and wing design. These small experiments gradually evolved into serious research, leading to the invention of gliders, then powered aeroplanes, and eventually spacecraft.

    In short: Curiosity → Experiment → Observation → Innovation → Aeroplane.

    - So, science often begins with playful curiosity that grows into serious exploration.
  3. Shadows and Time.
    - Long before modern clocks, humans observed shadows cast by the Sun. The changing position of shadows helped them measure time, leading to the invention of – ‘Sundials’. This shows how observation of nature guided early scientific progress.
  4. Light and Human Progress.
    - Light allows us to see, but humans learned to create artificial light to extend activities beyond sunset. From fire and candles to bulbs and LEDs, science has continuously improved how we generate light. This reflects how science solves practical problems and improves daily life.
  5. Shadows of Celestial Bodies.
    - The Earth and Moon can block sunlight, creating eclipses.
    - Earth’s rotation causes day and night, while its revolution around the Sun brings seasons.
    - These phenomena remind us that science explains both natural cycles and extraordinary events.
  6. Thinking like a Scientist.
    - Science is not just knowledge, it is a method of inquiry.
    - A scientist observes, asks questions, experiments, and draws conclusions.
    - Asking the right questions is often more important than having ready answers.

References

  • NCERT BOOKS.

Further Reading

Video of This Chapter Exercise Question & Answers Word-Meaning Extra Bytes for Smart Brains
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