One Word Qns for DTEd students [ 8th std. Sc.Contents]

Fill in the blanks with the appropriate words / terms.
1. Visible light is the part of the ________ spectrum that the human eye can detect.
2. Law of refraction has proposed by ________ .
3. The objects in the water appear to be at ________ depth due to refraction.
4. Velocity of the light in the Kerosene is ________.
5. Refractive Index of the medium = Velocity of the light in the ________ / velocity of the light in the medium.
6. 1.96 x 108 is the velocity of the medium known as ________ .
7. Water has the Velocity of the light ________ .
8. The persons who can see only the nearer objects are having the eye defect known as ________.
9. Mention the branch of Physics that deals with the equilibrium of fluids: _____ .
10. One atmospheric pressure is equal to the pressure exerted by a column of ________ .
11. Buoyant force depends on the ______ liquid.
12. ______ is located above 80 km. and it is a hot layer of atmosphere.
13. Boiling point of the Nitrogen is _______.
14. Boiling point of the Mercury is _______ .
15. Atomic Mass Unit (amu) of the electron is __________ .
16. Protium is the isotope of ______ .
17. A definite combining capacity of an atom is known as ________ .
18. The hardest of all non metals is ________ .
19. _____ is the unit used for measuring the purity of Gold.
20. The metal used for galvanisation is _____ .
21. The temperature of the interior of the sun is _____ .
22. The temperature at which a magnet loses its magnetic power is known as ___.
23. ______ observed the magnetic effect of current in 1820.
24. The long sight is called as ______ .
25. Geometric centre of the lens is called ______ .
26. The allotrope which contains 60 carbon atoms is ______.
27. Graphite melts at _______ .
28. The Curie point of Iron is _____ .
29. An example for the common sources of the electric current: ______.
30. The ratio of the density of liquid to the density of water is called ________ .
31. Atomic Number is denoted by the Symbol ____ .
32. The Mass Number is denoted by the Symbol ____ .
33. Valency of the Aluminium is ____.
34. An atom is electrically _____.
35. Which is pure Gold ? 24 Carat / 22 carat / 18 Carat / 100% .
36. The pure gold can not be used in jewellery because it is ______ .
37. _____ is used in storage batteries.
38. A homogeneous mixture of a metal with other metals or non-metals is an _____ .
39. Mechanical Advantage = Load / _____ .
40. An example for the Third order levers is _____ .
41. In a single fixed pulley, the mechanical advantage is equal to ____ .
42. The animal which has plastids: ______ .
43. The plant which can move from place to place: _____ .
44. All prokaryotes belong to the kingdom ______ .
45. Porifera means _______.
46. Scientific name for Orange is _____ .
47. ______ is a symbiotic bacteria.
48. The bacterial cell which has no flagella are termed as _____.
49. In pteridophytes, the dominant plant is the ______.
50. In the mouth cavity there are _____ pairs of salivary glands.

Kindly Note:
The students who has gone thro' this questions must secure 95% in 30 minutes.
Let's make things better.


Lovingly,
yours

Thulasi.Madhavan