3rd Class General Knowledge Science and Technology Notes - Science and Technology

Notes - Science and Technology

Category : 3rd Class

Science and Technology


Interesting Facts

  •          You can survive entirely on a diet of potatoes and butter which provide all the necessary materials that human body needs.


Technology today has already evolved into a more complex and diverse system than ever before. The immeasurable impact of technology in our everyday life can be viewed m many different ways. As the technology goes beyond age, it becomes more developed, influencing almost all walks of human life.


However, we can observe all levels of technological devices in everyday life from phones, to watches all the way to laptops. The increase in demand for these products has given rise to huge brand names that currently dominate the industries. Most businesses nowadays, are highly dependent on technology. Imagine if there was no internet all of the sudden computers went away completely, a lot of business would have to close and be lost forever.

Here are the top 5 gadgets that have been integrated into our everyday life.


Do you know?

  •          Charles Babbage invented all the parts that are now used for a modern computer.
  •          Smartphones are seen as a computer but are small enough to fit in someone hands.
  •          A smart T.V. is a television set with integrated internet.


1.            Computer/Laptops - Computers and laptops are considered the primary source of information They have the ability to access the internet create content, store files, and much more. Computers are the most influential teen-devices on the market today. Computers and internet have shaped how we do everyday tasks.


2.            Smartphones - Phones were primarily invented as a means of communication. Apart from that, currently smartphones are much more closely used the same way computers are. They too have the ability to access the internet almost anywhere in the world access and store files, take photos and tons more.'


3.            Smart T.V.'s - You no longer have to leave the house to get the viewing quality of the theater, although I do enjoy going to the movie. You can easily replicate that experience in your own home with smart TV 's They offer a wide range of quality products with endless options that can create the ultimate viewing solution


4.            Tablets - Much like smartphones with features like a computer, tablets are amazing devices that many people use everyday. They have tons of apps that make day to day tasks much easier. People use tablets to play games, manage schedules, entertain young children and much more.


5.            Gaming Consoles - Provide some of the most enjoyable content of all of the devices. Whether you have played one before or know about gaming, you know how big this industry is. Many people use gaming daily as a way of stress relief and others have used gaming as a career path; making many dreams come true.


Because of the increasing rate of technological innovation, everyone is dying to have the newest model or the best technology. But keep in mind that attaching too much of yourself to something is not that good. You should be disciplined and aware of your limits in using technology.

However, it's not bad to be a technology oriented person. Just set rules for yourself.


Do you know?

  •         For children, electronic devices may help to stimulate the senses and imagination.
  •         Using computers may improve manual dexterity and build computer literacy.
  •         Mastering games builds confidence and develops hand-eye coordination




1.            The effects of electronic gadgets can have an, impact on students studying habits. With the help of technology, subjects are taught in a more fun and exciting way.

2.            Technology is a great tool for learning in an efficient manner. It makes it easier for the teachers, as well as the students.

3.            The effects of electronic gadgets can make students learn how to write essays in a more developed manner.

4.            Cellphones give them the freedom to communicate quickly and give students the ability to research anything, anywhere.

5.            With the electronic gadgets, you can even learn from your own home, through web seminars.



1.            On an average, children spend more than seven hours per day on an electronic device.

2.            They may have a difficulty in concentrating on their studies, when most of their time is spent on these devices and have a poor academic performance.

3.            Many commercials highlighting electronic products and gadgets have been a target to young children.

4.            Due to increasing technology, children are going far apart from their moral values. Rather than using the internet in a more productive manner, most of the children use it as a source of adult content.


Interesting Facts

  •            In morning eating an apple will keep you awake better than drinking coffee.




1.            A man with a load jumps from a high building. What will be we the load experienced by him?

Ans.     Zero, because while falling both the man and the load are falling at the same acceleration.


2.            Why it is recommended to add salt to water while boiling daal?

Ans.     By addition of salt, the boiling point of water gets raised which helps in cooking the daal sooner.


3.            Why is the sky blue?

Ans.     Violet and blue light scatters more than red light.

While red light goes almost straight through the atmosphere, blue and violet are scattered by particles in the atmosphere.


4.            Why does ice float on water but sink in alcohol?

Ans.     Because ice is lighter than water it floats on it.

However, ice is heavier than alcohol and therefore, it sinks in alcohol.


5.            Why do we perspire before rains?

Ans.     Before the rain falls, the atmosphere gets saturated with water vapour, as a result the process of evaporation of sweat is delayed.


6.            How do birds sit safely on electric power lines?

Ans.     This is possible because a bird only touches one line. If the bird were to touch another line or pole, the electricity would travel through the bird, either to the ground or another wire. 








Stem Engine

James Watt






Alexander graham Bell



Benjamin Franklin


Electric Bulb

Thomas Edison



Daniel Gabriel Fahrenheit



J.L. Baird






Ferdinand verbiest





Video Games

Ralph H. bear



Vint Cert


Air Conditioner

Willis carrier


Ball Point

John J. Loud


Ceiling Fans

Philip Diehl


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Notes - Science and Technology
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