Science : Class 6 to 8 - One word QA

Here are 100 One-Word Question Answers (Class 6–8 Science):

1. Unit of force? — Newton
2. Process by which plants make food? — Photosynthesis
3. Gas needed for breathing? — Oxygen
4. Closest planet to the Sun? — Mercury
5. SI unit of length? — Metre
6. Device to measure temperature? — Thermometer
7. Hardest natural substance? — Diamond
8. Centre of an atom? — Nucleus
9. Force that pulls objects to Earth? — Gravity
10. Liquid changing into vapour? — Evaporation
11. Vitamin from sunlight? — VitaminD
12. Red planet? — Mars
13. Instrument to see microorganisms? — Microscope
14. Main gas in air? — Nitrogen
15. Unit of electric current? — Ampere
16. Organ that pumps blood? — Heart
17. Green pigment in leaves? — Chlorophyll
18. Vapour changing into liquid? — Condensation
19. Largest planet? — Jupiter
20. Energy from the Sun? — Solar
21. Device to measure time? — Clock
22. Framework of bones? — Skeleton
23. Unit of mass? — Kilogram
24. Gas used in photosynthesis? — CarbonDioxide
25. Sprouting of seed? — Germination
26. Smallest unit of life? — Cell
27. Device to measure rainfall? — RainGauge
28. Earth’s natural satellite? — Moon
29. Movement of Earth around Sun? — Revolution
30. Movement of Earth on its axis? — Rotation
31. Animals that eat plants? — Herbivores
32. Animals that eat flesh? — Carnivores
33. Animals that eat both? — Omnivores
34. Removal of body waste? — Excretion
35. Process of breathing? — Respiration
36. Unit of speed? — m/s
37. Example of conductor? — Copper
38. Example of insulator? — Rubber
39. Transparent material for windows? — Glass
40. Star at centre of solar system? — Sun
41. Instrument to measure wind speed? — Anemometer
42. Solid to liquid change? — Melting
43. Organ for breathing in fish? — Gills
44. Largest human organ? — Skin
45. Example of fossil fuel? — Coal
46. Bending of light? — Refraction
47. Device storing electric energy? — Battery
48. Scientist who discovered gravity? — Newton
49. Boiling point of water (°C)? — 100
50. Freezing point of water (°C)? — 0
51. Process of water cycle? — Precipitation
52. Layer of air around Earth? — Atmosphere
53. Instrument to measure pressure? — Barometer
54. Unit of energy? — Joule
55. Blood vessels carrying blood from heart? — Arteries
56. Blood vessels carrying blood to heart? — Veins
57. Red pigment in blood? — Haemoglobin
58. Example of amphibian? — Frog
59. Example of reptile? — Snake
60. Example of mammal? — Whale
61. Example of renewable resource? — Wind
62. Process of making curd? — Fermentation
63. Metal liquid at room temperature? — Mercury
64. Unit of voltage? — Volt
65. Device to measure electric current? — Ammeter
66. Device to measure voltage? — Voltmeter
67. Mirror that forms real image? — Concave
68. Mirror used in vehicles? — Convex
69. Transfer of heat in liquids? — Convection
70. Transfer of heat in solids? — Conduction
71. Transfer of heat without medium? — Radiation
72. Example of parasite? — Leech
73. Instrument to see distant objects? — Telescope
74. Unit of frequency? — Hertz
75. Planet known as morning star? — Venus
76. Gas essential for burning? — Oxygen
77. Study of plants? — Botany
78. Study of animals? — Zoology
79. Study of weather? — Meteorology
80. Study of fossils? — Palaeontology
81. Example of simple machine? — Lever
82. Fixed point of lever? — Fulcrum
83. Unit of power? — Watt
84. Fastest land animal? — Cheetah
85. Example of biodegradable waste? — Peels
86. Example of non-biodegradable waste? — Plastic
87. Acid present in lemon? — Citric
88. Acid present in vinegar? — Acetic
89. Base used in whitewashing? — Lime
90. Unit of density? — kg/m³
91. Device to detect earthquakes? — Seismograph
92. Sudden shaking of Earth? — Earthquake
93. Molten rock inside Earth? — Magma
94. Molten rock outside Earth? — Lava
95. Outer layer of Earth? — Crust
96. Process of rusting? — Oxidation
97. Scientist who invented bulb? — Edison
98. Example of neutral substance? — Water
99. Energy stored in food? — Chemical
100. Shape of Earth? — Sphere