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MCQOPTIONS
This section includes 2268 Mcqs, each offering curated multiple-choice questions to sharpen your Grade7 knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The distance between Sirius and Earth is about |
| A. | 6 light years |
| B. | 9 light years |
| C. | 12 light years |
| D. | 120 light years |
| Answer» C. 12 light years | |
| 52. |
Compared to an optical telescope, the radio telescope should be |
| A. | small in size |
| B. | same in size |
| C. | large in size |
| D. | tiny in size |
| Answer» D. tiny in size | |
| 53. |
The stars we see in a dark night are |
| A. | hundreds of miles away |
| B. | thousands of miles away |
| C. | millions of miles away |
| D. | zillions of miles away |
| Answer» D. zillions of miles away | |
| 54. |
The distance that light travels in one year is known as |
| A. | approximate distance |
| B. | star speed |
| C. | light year |
| D. | sound year |
| Answer» D. sound year | |
| 55. |
Neutron stars are much denser than |
| A. | red super giants |
| B. | blue giants |
| C. | white dwarfs |
| D. | yellow stars |
| Answer» D. yellow stars | |
| 56. |
In 1930, astronomers divided sky into |
| A. | 66 areas |
| B. | 77 areas |
| C. | 88 areas |
| D. | 99 areas |
| Answer» D. 99 areas | |
| 57. |
A neutron star weighs more than |
| A. | Moon |
| B. | Sun |
| C. | Comet |
| D. | Earth |
| Answer» C. Comet | |
| 58. |
More constellations were discovered when people drew maps of |
| A. | horoscopes |
| B. | sky during daytime |
| C. | sky during night |
| D. | celestial bodies |
| Answer» D. celestial bodies | |
| 59. |
The telescope that makes a far off object bigger is known as |
| A. | Radio telescope |
| B. | Reflecting telescope |
| C. | Refracting telescope |
| D. | Hubble telescope |
| Answer» D. Hubble telescope | |
| 60. |
The clot of blood formed in the blood vessel is known as |
| A. | hemophilia |
| B. | anemia |
| C. | thrombosis |
| D. | varicose vein |
| Answer» D. varicose vein | |
| 61. |
Tiny vessels link up and form a |
| A. | artery |
| B. | vein |
| C. | capillary |
| D. | nerve |
| Answer» C. capillary | |
| 62. |
The vessel which takes the blood from heart to lungs, is known as |
| A. | renal artery |
| B. | pulmonary artery |
| C. | renal vein |
| D. | pulmonary vein |
| Answer» C. renal vein | |
| 63. |
The walls of left ventricle are thicker than the walls of right ventricle because |
| A. | it has to pump blood to the whole body |
| B. | it has to pump the blood to lungs |
| C. | blood reaches this ventricle in huge amount |
| D. | blood reaches this ventricle with extra pressure |
| Answer» B. it has to pump the blood to lungs | |
| 64. |
The heart is also called |
| A. | muscular pump |
| B. | pumping device |
| C. | pumping machine |
| D. | pumping muscle |
| Answer» B. pumping device | |
| 65. |
The name of physicist who discovered the nucleus of atom was |
| A. | Democritus |
| B. | John Dalton |
| C. | Ernest Rutherford |
| D. | Vander Waals |
| Answer» D. Vander Waals | |
| 66. |
If the mass of protons and neutrons is 1, then the mass of electron is |
| A. | 2 |
| B. | 2-Jan |
| C. | 4-Jan |
| D. | 1/1890 |
| Answer» E. | |
| 67. |
To trace the path of phosphorus, the isotope of phosphorus which is added to the fertilizers, is |
| A. | Phosphorus-31 |
| B. | Phosphorus-32 |
| C. | Phosphorus-33 |
| D. | Phosphorus-34 |
| Answer» C. Phosphorus-33 | |
| 68. |
The attraction of two ions due to opposite charge is known as |
| A. | ionic bonding |
| B. | covalent bonding |
| C. | metallic bonding |
| D. | dative bonding |
| Answer» B. covalent bonding | |
| 69. |
To find out number of neutrons in an atom, we need to know the |
| A. | atomic number |
| B. | proton number |
| C. | electron number |
| D. | mass number |
| Answer» E. | |
| 70. |
Only those plants and animals will remain on earth that |
| A. | grow |
| B. | eat |
| C. | reproduce |
| D. | sleep |
| Answer» D. sleep | |
| 71. |
The egg in the carpel is known as |
| A. | stigma |
| B. | style |
| C. | ovary |
| D. | ovule |
| Answer» E. | |
| 72. |
In most species of plants, food is stored in |
| A. | radicle |
| B. | plumule |
| C. | cotyledon |
| D. | zygote |
| Answer» D. zygote | |
| 73. |
When the ovule and the nucleus of the pollen grain are joined together, we say that the ovule is |
| A. | pollinated |
| B. | reproduced |
| C. | fertilized |
| D. | infected |
| Answer» D. infected | |
| 74. |
Wind pollinated flowers hangs |
| A. | upwards |
| B. | downwards |
| C. | left |
| D. | right |
| Answer» C. left | |
| 75. |
When gases are heated, they |
| A. | expand more than solids but less than liquids |
| B. | expand more than liquids but less than solids |
| C. | do not expand |
| D. | both b and c |
| Answer» E. | |
| 76. |
Bakelite is a good |
| A. | conductor |
| B. | insulator |
| C. | metal |
| D. | solid |
| Answer» C. metal | |
| 77. |
As compare to gases, liquids are |
| A. | incompressible |
| B. | compressible |
| C. | more compressible than liquids |
| D. | less compressible than liquids |
| Answer» B. compressible | |
| 78. |
Number of gases joined together to make PVC is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 79. |
Gases are compressible because of |
| A. | space between particles |
| B. | collision of particles |
| C. | movement of particles |
| D. | attraction force between particles |
| Answer» B. collision of particles | |
| 80. |
The largest ocean on earth is |
| A. | Pacific Ocean |
| B. | Atlantic Ocean |
| C. | Antarctic Ocean |
| D. | Arctic Ocean |
| Answer» B. Atlantic Ocean | |
| 81. |
Oil can be poison for |
| A. | insect's life |
| B. | aquatic life |
| C. | animal's life |
| D. | human life |
| Answer» C. animal's life | |
| 82. |
Polar ice caps are found near the |
| A. | East and West poles |
| B. | East and North poles |
| C. | North and South poles |
| D. | West and South poles |
| Answer» D. West and South poles | |
| 83. |
The tanks that supply water to towns are built at |
| A. | roofs of buildings |
| B. | high towers |
| C. | town level |
| D. | high lands |
| Answer» C. town level | |
| 84. |
Fluoride is also added to water, which helps in preventing |
| A. | infection |
| B. | sickness |
| C. | fever |
| D. | tooth decay |
| Answer» E. | |
| 85. |
The concave lens is also known as |
| A. | converging lens |
| B. | diverging lens |
| C. | dispersing lens |
| D. | conducting lens |
| Answer» C. dispersing lens | |
| 86. |
When light bends, it |
| A. | causes tricks in the air |
| B. | causes tricks on our eyes |
| C. | causes tricks on our brain |
| D. | damages our eyes |
| Answer» C. causes tricks on our brain | |
| 87. |
Thin flexible glass rods to transfer data from one region to another are known as |
| A. | glass cables |
| B. | reflection fibers |
| C. | optical fibers |
| D. | copper fibers |
| Answer» D. copper fibers | |
| 88. |
If light enters any substance with refractive index, it is |
| A. | perpendicular |
| B. | at a certain angle |
| C. | parallel |
| D. | at critical angle |
| Answer» D. at critical angle | |
| 89. |
The refractive index of water is |
| A. | 0.33 |
| B. | 0.5 |
| C. | 1.5 |
| D. | 1.33 |
| Answer» E. | |
| 90. |
Miniature circuit breaker is a small |
| A. | fuse |
| B. | magnetic switch |
| C. | electromagnetic switch |
| D. | two way switch |
| Answer» D. two way switch | |
| 91. |
The charge flowing in the wire when we turn the light on, is |
| A. | positive ions |
| B. | negative ions |
| C. | electrons |
| D. | protons |
| Answer» D. protons | |
| 92. |
To make the coil keep rotating, the current is reversed after every half turn by a device called |
| A. | brush |
| B. | commutator |
| C. | mutator |
| D. | carbon spring |
| Answer» C. mutator | |
| 93. |
The pure piece of metal which is used to be plated, is made the |
| A. | anode |
| B. | cathode |
| C. | nematode |
| D. | posit rode |
| Answer» B. cathode | |
| 94. |
Steel cans are made of |
| A. | lead |
| B. | tinplate |
| C. | tungsten |
| D. | cobalt |
| Answer» C. tungsten | |
| 95. |
Name of the American space probe is |
| A. | Ulysses |
| B. | Helios A |
| C. | Helios B |
| D. | Genesis |
| Answer» B. Helios A | |
| 96. |
The world's largest telescope is situated in |
| A. | Western Australia |
| B. | Russia |
| C. | China |
| D. | Puerto Rico |
| Answer» E. | |
| 97. |
The world's largest reflecting telescope is situated in |
| A. | Maldives |
| B. | Canary Islands |
| C. | Cyprus |
| D. | Denmark |
| Answer» C. Cyprus | |
| 98. |
Red supergiants are |
| A. | cooler |
| B. | hotter |
| C. | normal |
| D. | hot or cold |
| Answer» B. hotter | |
| 99. |
In a reflecting telescope, a large concave mirror bounces all the light coming through the |
| A. | sky |
| B. | sun |
| C. | telescope barrel |
| D. | telescope tip |
| Answer» D. telescope tip | |
| 100. |
Fossils fuel is an important source of energy for |
| A. | transport |
| B. | homes |
| C. | industries |
| D. | all of them |
| Answer» E. | |