MCQOPTIONS
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MCQOPTIONS
This section includes 532 Mcqs, each offering curated multiple-choice questions to sharpen your Grade8 knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
The blood which is oxygenated in lungs is carried to heart by |
| A. | pulmonary veins |
| B. | carotid veins |
| C. | aorta |
| D. | jugular vein |
| Answer» B. carotid veins | |
| 452. |
Human beings have specialized structure to carry out exchange of gases called |
| A. | respiratory system |
| B. | digestion system |
| C. | nervous system |
| D. | circulatory system |
| Answer» B. digestion system | |
| 453. |
The regions where molecules are compressed are called |
| A. | rarefactions |
| B. | compressions |
| C. | digressions |
| D. | progressions |
| Answer» C. digressions | |
| 454. |
Sound travels at speed of 5960m/s in |
| A. | air |
| B. | water |
| C. | steel |
| D. | water |
| Answer» D. water | |
| 455. |
Loudness is measured by |
| A. | sound level meter |
| B. | spectrometer |
| C. | thermostat |
| D. | thermometer |
| Answer» B. spectrometer | |
| 456. |
A form of energy which is produced by vibrations and can be detected by ears is called |
| A. | sound |
| B. | waves |
| C. | heat |
| D. | electric current |
| Answer» B. waves | |
| 457. |
Sounds which are below 20Hz frequencies are called |
| A. | infrasound |
| B. | ultrasound |
| C. | mega sound |
| D. | micro sound |
| Answer» B. ultrasound | |
| 458. |
The deadly disease which is caused by a parasitic micro-organism called plasmodium is |
| A. | Malaria |
| B. | Dengue |
| C. | Polio |
| D. | Rubella |
| Answer» B. Dengue | |
| 459. |
Unicellular microscopic fungi are |
| A. | yeast |
| B. | mould |
| C. | toadstool |
| D. | penicillium |
| Answer» B. mould | |
| 460. |
The introduction of dead or weak germs in to body orally or by injection to train body to fight the real germs on attack is called |
| A. | vaccination |
| B. | immunization |
| C. | both a and b |
| D. | infecting |
| Answer» D. infecting | |
| 461. |
A medicine which is used to treat or cure bacterial diseases by killing or stopping their growth of bacteria is called |
| A. | antibody |
| B. | antigen |
| C. | antibiotics |
| D. | antiseptics |
| Answer» D. antiseptics | |
| 462. |
The thread like structure which helps bacteria to move is called |
| A. | flagella |
| B. | chromosome |
| C. | cell wall |
| D. | nucleus |
| Answer» B. chromosome | |
| 463. |
In thermometer the element which is used to show temperature is |
| A. | copper |
| B. | zinc |
| C. | mercury |
| D. | platinum |
| Answer» D. platinum | |
| 464. |
Bimetallic strip when heated bends |
| A. | upwards |
| B. | downwards |
| C. | straight |
| D. | inside |
| Answer» C. straight | |
| 465. |
Hot air balloons rises due to occurrence of expansion of |
| A. | gases |
| B. | balloon |
| C. | fuel |
| D. | flame |
| Answer» B. balloon | |
| 466. |
A fluid is a substance which can |
| A. | flow |
| B. | evaporate |
| C. | condense |
| D. | gain heat |
| Answer» B. evaporate | |
| 467. |
When the state of matter changes the temperature |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | raised |
| Answer» D. raised | |
| 468. |
When light in passed through two consecutive mirrors the resultant will be |
| A. | rainbow colors |
| B. | white beam |
| C. | no light |
| D. | dispersed light |
| Answer» C. no light | |
| 469. |
The angle of reflection lies between reflected ray and |
| A. | normal ray |
| B. | incident ray |
| C. | convergent ray |
| D. | all of them |
| Answer» B. incident ray | |
| 470. |
A red filter will absorb colors and only transmit |
| A. | white light |
| B. | red light |
| C. | primary light |
| D. | no light |
| Answer» C. primary light | |
| 471. |
The image formation in human eye is done in |
| A. | cornea |
| B. | retina |
| C. | lens |
| D. | fluid |
| Answer» C. lens | |
| 472. |
The type of reflection which occurs in diffused or scattered way produces |
| A. | light image |
| B. | darker image |
| C. | detailed outline image |
| D. | no image |
| Answer» E. | |
| 473. |
Rice potato, bread, cereals, noodles, yam and cassava has main nutrient which is |
| A. | sugar |
| B. | starch |
| C. | vitamin |
| D. | fats |
| Answer» C. vitamin | |
| 474. |
A diet containing right amount of energy, carbohydrates, proteins, fats, fiber, vitamins, minerals and water to fulfill requirement of body is called |
| A. | nutrition |
| B. | balanced diet |
| C. | perfect diet |
| D. | food pyramid |
| Answer» C. perfect diet | |
| 475. |
Bile is stored in |
| A. | liver |
| B. | pancreas |
| C. | gall bladder |
| D. | stomach |
| Answer» D. stomach | |
| 476. |
Knife like teeth which slice food into small pieces are called |
| A. | molars |
| B. | canines |
| C. | incisors |
| D. | premolars |
| Answer» D. premolars | |
| 477. |
With deficiency in vitamin K patient may face |
| A. | bruises |
| B. | prolonged bleeding |
| C. | both a and b |
| D. | night blindness |
| Answer» D. night blindness | |
| 478. |
The part of human eye which is sensitive to red, blue and green light is |
| A. | retina |
| B. | lens |
| C. | cornea |
| D. | vision |
| Answer» B. lens | |
| 479. |
Mirror which have inner surface like a sphere is called |
| A. | convex mirror |
| B. | concave mirror |
| C. | plane mirror |
| D. | cosmetic mirror |
| Answer» C. plane mirror | |
| 480. |
The ray which is striking the surface is |
| A. | normal ray |
| B. | incident ray |
| C. | reflected ray |
| D. | all of them |
| Answer» C. reflected ray | |
| 481. |
Glass, tracing paper are |
| A. | transparent |
| B. | translucent |
| C. | opaque |
| D. | semi-absorbent |
| Answer» C. opaque | |
| 482. |
The beam of light can be |
| A. | straight |
| B. | divergent |
| C. | convergent |
| D. | all of them |
| Answer» E. | |
| 483. |
The first part of ear which collects air which is funnel shaped is called |
| A. | pinna |
| B. | ear drum |
| C. | hammer |
| D. | cochlea |
| Answer» B. ear drum | |
| 484. |
Loudness is measured in units called |
| A. | Hertz |
| B. | decibels |
| C. | Pascal |
| D. | ampere |
| Answer» C. Pascal | |
| 485. |
A thin sheet of membrane which is stretched tightly across the end of ear canal is called |
| A. | pinna |
| B. | ear drum |
| C. | hammer |
| D. | cochlea |
| Answer» C. hammer | |
| 486. |
The human ear can be divided in to |
| A. | outer ear |
| B. | middle ear |
| C. | inner ear |
| D. | all of them |
| Answer» E. | |
| 487. |
A loud sound contains more energy than |
| A. | soft sound |
| B. | aero plane sound |
| C. | blast sound |
| D. | rocket sound |
| Answer» B. aero plane sound | |
| 488. |
Citrus fruits are rich in |
| A. | vitamin A |
| B. | vitamin B1 |
| C. | vitamin C |
| D. | vitamin D |
| Answer» D. vitamin D | |
| 489. |
A substance which provide nourishment is called a |
| A. | food |
| B. | carbohydrates |
| C. | nutrient |
| D. | minerals |
| Answer» D. minerals | |
| 490. |
The enzyme which is present in mouth is called |
| A. | salivary enzyme |
| B. | amylase |
| C. | proteases |
| D. | bile |
| Answer» B. amylase | |
| 491. |
Carbohydrates, fats, proteins, fiber, vitamins, minerals and water are all included in |
| A. | nutrients |
| B. | diet |
| C. | food |
| D. | milk |
| Answer» B. diet | |
| 492. |
The entry and exit of food from stomach is controlled by |
| A. | muscular sphincters |
| B. | cardiac sphincters |
| C. | both a and b |
| D. | skeletal sphincters |
| Answer» B. cardiac sphincters | |
| 493. |
When the light falls on an object it can be |
| A. | reflected |
| B. | transmitted |
| C. | absorbed |
| D. | all of them |
| Answer» E. | |
| 494. |
Bakelite is an |
| A. | transparent |
| B. | translucent |
| C. | opaque |
| D. | semi-absorbent |
| Answer» D. semi-absorbent | |
| 495. |
In case of extended source of light the shadow is mostly composed of darker region called |
| A. | umbra |
| B. | penumbra |
| C. | screen |
| D. | source |
| Answer» B. penumbra | |
| 496. |
In case of glass the ray of light bends towards |
| A. | normal ray |
| B. | incident ray |
| C. | reflected ray |
| D. | no ray |
| Answer» B. incident ray | |
| 497. |
The line which is at right angle to the surface is called |
| A. | normal ray |
| B. | incident ray |
| C. | reflected ray |
| D. | all of them |
| Answer» B. incident ray | |
| 498. |
A comparison between metamorphic rock and its parent rock will yield different |
| A. | mineral content |
| B. | texture |
| C. | structure |
| D. | all of them |
| Answer» E. | |
| 499. |
Fine grained calcium carbonate layer of rock formed from micro-organisms is |
| A. | Shelly limestone |
| B. | chalk |
| C. | oolitic limestone |
| D. | all of them |
| Answer» C. oolitic limestone | |
| 500. |
Quartzite is transformed from |
| A. | sandstone |
| B. | limestone |
| C. | igneous rock |
| D. | shale |
| Answer» B. limestone | |