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General Knowledge Class 7 - Science And-Technology Notes

Comprehensive study notes for Class 7 - Science And-Technology olympiad preparation

Science and Technology

Welcome to the chapter on Science and Technology for Class 7. In this chapter, you will learn about important discoveries, inventions, and the latest advancements in science and technology. By the end of this chapter, you will know how science and technology shape our world and improve our lives!

Introduction

Science helps us understand the world around us. Technology uses scientific knowledge to create tools and machines that make life easier. Both are important for progress and development.

Major Scientific Discoveries

  • Gravity discovered by Isaac Newton
  • Electricity studied by Benjamin Franklin and Thomas Edison
  • Vaccines developed by Edward Jenner and Louis Pasteur
  • Structure of DNA discovered by Watson and Crick

Important Inventions

  • Telephone by Alexander Graham Bell
  • Light bulb by Thomas Edison
  • Aeroplane by Wright Brothers
  • Computer by Charles Babbage (concept)
  • Internet (developed by many scientists)

Latest Advancements

  • Artificial Intelligence (AI) and Robotics
  • Smartphones and Tablets
  • Electric Cars and Renewable Energy
  • Space Exploration (Mars missions, satellites)
  • Medical Technology (vaccines, surgery robots)

Science and Technology in Daily Life

  • Using computers and the internet for learning
  • Mobile phones for communication
  • Microwave ovens and refrigerators in kitchens
  • Online banking and shopping
  • Medical tests and treatments

Fun Activity: Science News Scrapbook

Collect newspaper clippings or printouts about new inventions or discoveries. Make a scrapbook and share with your class!

Summary

  • Science explains natural phenomena.
  • Technology uses science to solve problems.
  • New inventions and discoveries improve our lives.

Practice Questions

  1. Who discovered gravity?
  2. Name two inventions that changed the world.
  3. What is Artificial Intelligence?
  4. How does technology help in communication?
  5. Name one recent advancement in medical technology.

Challenge Yourself

  • Write a short note on your favorite invention.
  • List three ways technology helps you in your studies.

Did You Know?

  • India has its own space agency called ISRO!
  • The first computer was as big as a room!

Glossary

  • Science: Study of the natural world.
  • Technology: Use of scientific knowledge for practical purposes.
  • Invention: A new device or method.
  • Discovery: Finding something new.

Answers to Practice Questions

  1. Isaac Newton
  2. Telephone, light bulb (any two: aeroplane, computer, internet, etc.)
  3. Smart machines that can think and learn like humans.
  4. Mobile phones, computers, internet.
  5. Robotic surgery, new vaccines, MRI machines.

Science and technology make our world exciting! Stay curious and keep learning about new discoveries.

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