We have have collected the important Gk questions for Class 9 Science with Answers to gain knowledge about how the universe works, how and why things happen the way they do. Also you will be able to know the past events, years and other historical knowledge.
Q.1. Who is the father of Physics in India ?
Ans. Hami Jehangir Bhabha (30 Oct 1909 – 24 Jan 1966). He was an Indian nuclear physicist, founding director and professor of physics,
Q.2. Full form of TIFR ?
Ans. Tata Institute of Fundamental Research.
Q.3. Who is the real father of Physics ?
Ans. Galileo Galilei (Pioneered the experimental scientific method and was the first to use a refracting telescope to make important astronomical discoveries)
Q. 4. Who is the king of science ?
Ans. Physics
Q. 5. Who is father of Computer Science ?
Ans. George Bode and Alan Turning.
Q. 6. Who are the 3 father of Physics ?
Ans. Issac Newton, Albert Einstein and Galileo Galilei
Q.7. What is physics ?
Ans. Physic is a branch of Science that deals with the study of natural phenomena that are prevalent in the nature.
Q. 8. Who invented Science ?
Ans. Aristotle
Q. 9. Who invented zero ?
Ans. Brahmagupta
Q. 10. An object travel 16m in 4s and the another 16m in 2s. What is the average speed of the object ?
Ans. Total distance travelled by object = 16m + 16m = 32m
Total time taken = 4s + 2s = 6s
Average Speed = Total distance travelled / Total time taken = 32 m / 6s = 5.33m per second
Q.11. What name is given to the speed in a specified direction ?
Ans. Speed of a body in a specified direction is called velocity .
Q. 12. When is a body said to have uniform velocity ?
Ans. When a body cover equal distances in equal interval of time in a particular direction, however short or long time interval may be, the object is said to have uniform velocity.
Q. 13. What is the another name of negative acceleration ?
Ans. Retardation.
Q. 14. What is the SI unit of momentum ?
Ans. Kilogram meters per second (kg. m/s)
Q. 15. What is the total momentum of the bullet and the gun before firing ?
Ans. Zero (Because velocities of both of them will be zero)
Q. 16. What is the other name of Newton’s first law of motion ?
Ans. Law of inertia
Q. 17. What is inertia ?
Ans. Inertia is the property of bodies to resist of change in their state of rest or motion.
Q. 18. Name the scientists who gave the laws of motion ?
Ans. Issac Newton
Q. 19. Which physical quantity corresponds to the rate of change of momentum ?
Ans. Force
Q. 20. Which physical principle is involved in the working of a jet aeroplane ?
Ans. Conservation of momentum
Q. 21. Name the physical quantity whose unit is Newton ?
Ans. Force
Q. 22. Who discovered jet aeroplane ?
Ans. Hans Von Ohain
Q. 23. Who discovered rocket first ?
Ans. Robert H. Goddard
Q. 24. How many satellite, Indian have ?
Ans. 53 operational satellites (21 are communicate satellites, 8 are navigation satellites, 21 are earth observation satellites and 3 are science satellites)
Q. 25. Who invented satellite ?
Ans. The Soviet Union launched sputnik (the first man-made satellite, shocking the American public and beginning the space age)
Q. 26. Name the principle on which a rocket works ?
Ans. Conservation of momentum.
Q. 27. Who is the father of atom ?
Ans. John Dalton
Q. 28. Who named atoms ?
Ans. Democritus
Q. 29. Who was the first person to fly a jet ?
Ans. Captain Erich Wersitz
Q. 30. Who was the first woman to fly a jet ?
Ans. Harriet Quimby.
Q. 31. Who invented atoms in India ?
Ans. Acharya Kanada
Q. 32. What is atomic mass ?
Ans. It is the mass of a chemical elements of single atom. It involves the mass of three atomic and subatomic particles protons, electrons and neutrons is called atomic mass.
Q. 33. What is the atomic mass of chlorine ?
Ans. 35.5
Q. 34. What is the atomic mass of hydrogan ?
Ans. 1
Q. 35. What is the atomic mass of carbon ?
Ans. 12
Q. 36. What is the atomic mass of nitrogen ?
Ans. 14
Q. 37. Who was the first scientist to used the symbols for elements ?
Ans. John Dalton
Q. 38. What is atom ?
Ans. All matter is made of very tiny particles called atoms which participate in chemical reactions.
Q. 39. What is molecule ?
Ans. A molecule is a group of two or more atoms that are chemically bonded together.
Q. 40. What is the formula of Ammonia ?
Ans. NH3
Q. 41. What is 1 watt of power ?
Ans. 1 watt is the power of an appliances which consumes energy at the rate of 1 joule per second.
Q. 42. What is the SI unit of energy / work ?
Ans. Joule (J)
Q. 43. What is the SI (Standard Unit) of force ?
Ans. Newton (N)
Q. 44. Who discovered cell ?
Ans. Robert Hook in 1665, he observed the cells in a cork slice with the help of microscope.
Q. 45. Who was discovered the nucleus in the cell ?
Ans. Robert Brown in 1831.
Q. 46. Who coined the term protoplasm for the fluid substance of the cell ?
Ans. Purkinje in 1839.
Q. 47. Who discovered the cell theory ?
Ans. Theodor Schwann in 1839.
Q. 48. What is cell ?
Ans. Cell is structural and functional unit of life to perform the different activities.
Q. 49. What is the other name of plasma membrane ?
Ans. Cell membrane.
Q. 50. What is plasma membrane ?
Ans. Plasma membrane is a biological membrane that separates the interior of all cells from the outside environment and protects the cell from its environment.
Q. 51. What is plasma membrane made of ?
Ans. Plasma membrane is a made up of glycerophospholipids, molecules composed of glycerol, phosphate group and two fatty acid chains.
Conclusion
General knowledge for class 9 Science with answers plays a crucial role for students to shine in academics as well as to improve the general awareness of the affairs in every sectors, continuous learning of general knowledge is important. There are numerous ways to enhance the general knowledge.