Question of the week: What is the world's greatest invention?
Ray Siu Sun-wang, 16,
Carmel Divine Grace Foundation Secondary School
The telephone. Humans do not live on their own. We need communication in all aspects. The invention of the telephone definitely changed our life as it shortened the distance between us. And no matter how far you live, you can still receive a love message. How sweet!
Jessica Chan Sze-tung, 15,
TWGHs Wong Fut Nam College
Fans keep you cool even when there's no breeze at all. Moreover, they give you a natural feeling but not like 'frozen meat' in the fridge when you have the air-con on.
Henry Lau Wai-ho, 16,
Carmel Divine Grace Foundation Secondary School What would happen if we didn't have electricity? How could we use computers? How would machines operate? In 1800, Volta invented the first battery. The electrical unit 'volt' was named after him.
Matthew Lam, 15,
Island School I think the telephone is the world's greatest invention. This Alexander Graham Bell invention made the world a smaller place. Families and friends can talk to each other no matter where they are, business deals can be made faster than before and accidents can be prevented.
Eric Lam King-fai, 16,
Hong Kong Chinese Women's Club College
Definitely language. How can people communicate in a world without language? Complicated ideas cannot be conveyed. Language can act as a preservation of history, thoughts and feelings, so we can evolve and improve.
Terence Li, 16,
St Mark's School
It has to be the camera. By simply pressing the shutter, the distortion of space (from 3-D to 2-D) involved in the exposure of film helps us preserve memories. We can also get second-hand information from the snaps, which saves a lot of time and effort - for other inventions.
Winnie Tong Wai-yee, 15,
Shun Tak Fraternal Association Lee Shau Kee College The computer, because it can help us organise and analyse the data we want. With the internet, we can get in touch with the whole world and easily access information from websites. Teachers can use information technology in teaching.
Ottilie Yuen Sze-wai, 16,
St Paul's Convent School
Words are the greatest invention of all. Words are what distinguish us from animals. And words are crucial to the development of society. Without records of our ancestors' knowledge, the development of technology and culture of mankind would certainly be hindered.
Dorothy Lo Lai-ying,15,
Shun Tak Fraternal Association Lee Shau Kee College
For me, it must be the telephone. Why? It has made great progress in communication since it was invented by Alexander Graham Bell in 1876. What's more, it does not cause any harm to the environment. It is very convenient too.
Gary Lee Chi-kei, 16,
Lok Sin Tong Ku Chiu Man Secondary School
The mobile phone. It relates us to different people. We can talk to friends whenever we want though they are far away. Also, it eases our life, for example, we use it to book services. Moreover, when we're in danger, we can use it to seek help.