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General Knowledge Class 3 - Science And-Technology Notes

Comprehensive study notes for Class 3 - Science And-Technology olympiad preparation

Science and Technology

Welcome to the chapter on Science and Technology for Class 3. In this chapter, you will learn about new inventions, discoveries, and how technology helps us in our daily life. By the end of this chapter, you will know about important scientists, useful machines, and how science and technology make our world better!

Introduction

Science helps us understand the world around us. Technology uses science to make tools and machines that help us work, learn, and play.

Famous Scientists and Inventors

  • Thomas Edison: Invented the electric bulb.
  • Alexander Graham Bell: Invented the telephone.
  • Marie Curie: Discovered new elements and won Nobel Prizes.
  • Dr. APJ Abdul Kalam: Known as the "Missile Man of India".

Useful Machines and Gadgets

  • Computer
  • Mobile phone
  • Television
  • Washing machine
  • Refrigerator

How Technology Helps Us

  • We can talk to friends far away using phones.
  • We learn new things using computers and the internet.
  • Machines help us do work faster and easier.
  • Doctors use technology to treat sick people.

Fun Activity: Spot the Gadget!

Look around your home and list all the machines and gadgets you see. Ask your family how each one helps them.

Summary

  • Science helps us learn about the world.
  • Technology uses science to make useful things.
  • Many machines and gadgets make our life easy and fun.

Practice Questions

  1. Who invented the electric bulb?
  2. Name two machines you use at home.
  3. How does a computer help you?
  4. Who is known as the "Missile Man of India"?
  5. Why is technology important?

Challenge Yourself

  • Draw and label your favorite gadget.
  • Find out about a new invention and share it with your class.

Did You Know?

  • The first computer was as big as a room!
  • Robots can help doctors do operations.

Glossary

  • Science: The study of the world around us.
  • Technology: Using science to make tools and machines.
  • Inventor: A person who creates something new.
  • Gadget: A small machine or tool.

Answers to Practice Questions

  1. Thomas Edison
  2. (Any two: computer, mobile phone, washing machine, refrigerator, television, etc.)
  3. It helps me learn, play games, and find information.
  4. Dr. APJ Abdul Kalam
  5. It makes our life easier and helps us do things faster.

Science and technology make our world exciting! Keep exploring and learning about new inventions.

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