1. The theory of relativity was propounded by Albert Einstein
2. The principal metal used in manufacturing steel is Iron.
3. An altimeter is used for measuring altitude
4. Oology is the study of Birds eggs
5. Radioactivity was discovered by Henry Bacquerel
6. The instrument used to measure the relative humidity of air is Hygrometer.
7. Barometer was invented by Torricelli.
8. The unit of power is Watt.
9. Radium was discovered by Marie and Pierrie Curie.
10. The existence of isotopes was discovered by Frederick Soddy.
11. Dynamo was invented by Michael Faraday.
12. The nuclear reactor was invented by Enrico Ferni.
13. The law of gravitation was propounded by Sir Isaac Newton.
14. Crescograph was invented by J.C.Bose.
15. Crescograph is used to measure the Rate of growth of a plant.
16. Galileo’s first scientific discovery was Pendulum.
17. Microscope was invented by Aaton Van Leewen Hock.
18. The scientist who is known as father of modern biology is Aristotle.
19. The first person to see a cell under microscope was Robert Hooke.
20. The smallest flowering plant is Wolffia.
21. The four blood groups were discovered by Karl Landsteiner.
22. Sodium was discovered by Sir Humphry Davy.
23. The atomic number of oxygen is Eight.
24. The basic building blocks of proteins are Amino acids.
25. The botanical name of the cotton plant is Gossipium Hirsutum.
26. An Electroscope is used to Detect charges on a body.
27. The unit of loudness level is Phon.
28. An ammeter is used to measure Electric current.
29. Plant that eat insects are called Insectivorous plant.
30. The metal used in storage batteries is Lead
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