Science and Technology
- When a metal is attacked by substances around it such as moisture, acids, etc., it is said to corrode and this process is called corrosion.
- The black coating on silver and the green coating on copper are other examples of corrosion
- Corrosion causes damage to car bodies, bridges, iron railings, ships and to all objects made of metals,specially those of iron
Why Indian Space Research Programme?
Need to protect the country, compete with technologically developed countries, stop the environmental damage always make an argument towards space program so where India lies today and where it started from makes the history of Indian space research.