General Knowledge Class 4 - Science And-Technology Notes
Comprehensive study notes for Class 4 - Science And-Technology olympiad preparation
Science and Technology
Welcome to the chapter on Science and Technology for Class 4. In this chapter, you will learn about important inventions, discoveries, and how technology helps us in our daily life. By the end of this chapter, you will know about famous scientists, useful gadgets, and the role of science and technology in making our world better!
Introduction
Science helps us understand the world around us. Technology uses science to create tools and machines that make life easier. Together, science and technology have changed the way we live, learn, and play.
Famous Scientists and Inventors
- Isaac Newton: Discovered gravity.
- Thomas Edison: Invented the electric bulb.
- Marie Curie: Discovered radium and polonium.
- Alexander Graham Bell: Invented the telephone.
- C.V. Raman: Indian scientist known for the Raman Effect.
Useful Gadgets and Machines
- Computer
- Mobile phone
- Television
- Refrigerator
- Microscope
- Washing machine
How Technology Helps Us
- We can talk to people far away using phones and computers.
- Doctors use machines to treat patients.
- We travel faster using cars, trains, and airplanes.
- We learn new things using the internet and educational apps.
Fun Activity: Science Around You
Look around your home and list five things that use science or technology. For example: fan, fridge, TV, mobile, clock.
Summary
- Science helps us understand nature and invent new things.
- Technology makes our life easier and better.
- Many gadgets and machines use science and technology.
Practice Questions
- Name two famous scientists.
- Which invention helps us talk to people far away?
- How does technology help doctors?
- List three gadgets you use at home.
- Who invented the electric bulb?
Challenge Yourself
- Draw and label a gadget you use every day.
- Find out about one Indian scientist and write two lines about their work.
Did You Know?
- The first computer was as big as a room!
- Solar panels use sunlight to make electricity.
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 device.
Answers to Practice Questions
- Isaac Newton, Marie Curie (any two).
- Telephone or mobile phone.
- Doctors use machines to check and treat patients.
- Computer, fridge, TV (any three).
- Thomas Edison.
Science and technology make our world exciting! Keep exploring and learning new things.