Q1. The number of oscillations per second is called the

Q2. Sound waves from a loudspeaker are caused by

Q3. The guitar has __________ strings.

Q4. The device used to measure movements of the heart is

Q5. The unit used to measure Pressure is

Q6. There are __________ methods of heat transfer.

Q7. Which from the following is NOT a method of heat transfer?

Q8. If we heat one end of metallic rod, the other end gets hot. The method of heat transfer is

Q9. A person seated in front of a fire receives heat by

Q10. The unit used to measure magnetic flux is

Q11. Battery was invented by

Q12. The most abundant element in the earth‘s crust is oxygen. The second most abundant element in the earth‘s crust is

Q13. The nearest planet to the Sun is

Q14. Bronze is an alloy of

Q15. Molecules with identical molecular formulae but with different structural formulae are called

Q16. One way of transfer of heat energy is convection which occurs in

Q17.  Which from the following is incompressible

Q18. The key factor in determining the weather is the quantity of ________ in the atmosphere.

Q19. The entropy of the universe is

Q20. Which from the following methods of heat transfer can take place in a vaccum?

Q21. Neutrons were discovered by

Q22. Mass Spectrograph was invented by

Q23. Nucleus was discovered by

Q24. Which is the process of science?

Q25. Salty water can be made pure by the method of