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प्रश्न
What is the difference between a discovery and an invention?
उत्तर
A discovery is identifying or finding out something that already existed, but which nobody knew about earlier.
e.g. Discovery of the structure of an atom
An invention, on the other hand, is creating something totally new that never existed before, using one’s own ideas and based on a thorough study of existing knowledge. e.g. Invention of the light bulb by Edison
APPEARS IN
संबंधित प्रश्न
Have you ever participated in or visited a science exhibition?
Did you observe/learn any new things there? What are those?
Scientists have to work very hard and make many sacrifices for years, to achieve success in their experiments. Why?
Discuss in pairs/groups about the precautions one has to take while working in a science laboratory. Write them in the form of Dos and Don’ts.
| Dos | Don’ts |
| Handle test tubes and other glass apparatus with care. | Don’t touch chemicals with bare hands. |
| ________________________ | ________________________ |
| ________________________ | ________________________ |
| ________________________ | ________________________ |
Write in one sentence each, why the following years were landmarks in the lives of Pierre and Marie Curie.
- 1895 __________________
- 1902 __________________
- 1903 __________________
- 1906 __________________
- 1911 __________________
Complete the web diagram with the qualities of Madame Curie.
Two discoverers of new lands
Two conquerers of the peak of Mt. Everest
Original name of Madame Curie
Her place of birth
Subjects Marie majored in, at the University of Paris
Nationality of her husband Pierre
Two radio- active elements discovered by Curies
Scientist who discovered the properties of uranium
What common characteristics did Marie and Pierre share, as students?
Which of the two scientists was greater than the other? Say why?
Why was the gift of a ton pitchblende, a great stroke of luck, to the Curies?
Besides the uses of radium and polonium mentioned in the text, in what other way, do you think, it is used in the field of medicine?
What proves that Marrie Curie was a true lover of humanity and not a wealth?
Read and understand the following word. Find out/search for proverb/thought/quote/slogan that is related to them.
Courage
Read and understand the following word. Find out/search for proverb/thought/quote/slogan that is related to them.
Strength of character
Read and understand the following word. Find out/search for proverb/thought/ quote/slogan that is related to them.
Determination
Read and understand the following word. Find out/search for proverb/thought/quote/slogan that is related to them.
Hard-work
Match the branches of Science with what fields they study :
| (A) | (B) |
| (a) Ecology | (i) Study of Atmosphere |
| (b) Geology | (ii) Study of Plant-life |
| (c) Meteorology | (iii) Study of the Universe |
| (d) Anatomy | (iv) Study of living organisms and environment |
| (e) Botany | (v) Study of human mind and emotions |
| (f) Psychology | (vi) Study of structure and functions of the body |
| (g) Cosmology | (vii) Study of solid earth and rocks |
