MCQOPTIONS
Saved Bookmarks
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.
| 1451. |
The name of the scientist who presented theory of dispersion of light was |
| A. | John Dalton |
| B. | Isaac Newton |
| C. | Albert Einstein |
| D. | Martin Charles burgh |
| Answer» C. Albert Einstein | |
| 1452. |
The types of cells in retina of eye include |
| A. | cones and fisheries |
| B. | cones and spheres |
| C. | cones and rods |
| D. | rods and spheres |
| Answer» D. rods and spheres | |
| 1453. |
The speed of light in water is |
| A. | Two-quarters of light speed in vacuum |
| B. | Three-quarters of light speed in vacuum |
| C. | one-third of light speed in vacuum |
| D. | two-third of speed of light in vacuum |
| Answer» C. one-third of light speed in vacuum | |
| 1454. |
The refraction of light has been proved by |
| A. | Law of Einstein |
| B. | Law of light |
| C. | Law of Refraction |
| D. | Law of Thomas |
| Answer» D. Law of Thomas | |
| 1455. |
A colored film that fits over a lamp or camera to change the color of the light passing through it, is known as |
| A. | effecter |
| B. | film |
| C. | filter |
| D. | effect |
| Answer» D. effect | |
| 1456. |
Most of the objects we see |
| A. | produce colors |
| B. | produce lights |
| C. | do not produce lights |
| D. | do not produce colors |
| Answer» D. do not produce colors | |
| 1457. |
A magenta filter absorbs |
| A. | all colors except red |
| B. | all colors except magenta |
| C. | magenta only |
| D. | magenta and its components |
| Answer» C. magenta only | |
| 1458. |
When red and blue are combined together, they form |
| A. | yellow |
| B. | magenta |
| C. | orange |
| D. | purple |
| Answer» C. orange | |
| 1459. |
Periscope is used in submarines to see the happenings of events |
| A. | above sea level |
| B. | on sea level |
| C. | in algae abundant ares |
| D. | behind a wall or a barrier |
| Answer» D. behind a wall or a barrier | |
| 1460. |
The change in speed of light when entering water is |
| A. | 5,000 km/s |
| B. | 50,000 km/s |
| C. | 100,000 km/s |
| D. | 200,000 km/s |
| Answer» C. 100,000 km/s | |
| 1461. |
Some objects look white in color like snow because they |
| A. | reflect all colors |
| B. | absorb all colors |
| C. | refract all colors |
| D. | absorb white color |
| Answer» B. absorb all colors | |
| 1462. |
The light which is refracted the least, is |
| A. | violet light |
| B. | red light |
| C. | blue light |
| D. | orange light |
| Answer» C. blue light | |
| 1463. |
Light is refracted in air. It enters our eyes through different angle this is why |
| A. | dizziness occurs |
| B. | mirages appear |
| C. | close objects move far |
| D. | far objects seem closer |
| Answer» C. close objects move far | |
| 1464. |
The convex lens is also known as |
| A. | converging lens |
| B. | diverging lens |
| C. | dispersing lens |
| D. | conducting lens |
| Answer» B. diverging lens | |
| 1465. |
If the angle of incidence of light while leaving the denser object is zero, the light would |
| A. | be reflected back |
| B. | go straight without any refraction |
| C. | be refracted |
| D. | end up at the boundary of the object |
| Answer» C. be refracted | |
| 1466. |
The lens in a human eye is |
| A. | convex |
| B. | concave |
| C. | biconcave |
| D. | biconvex |
| Answer» E. | |
| 1467. |
Inside rain droplet, light |
| A. | is refracted twice |
| B. | is refracted thrice |
| C. | is reflected once |
| D. | is reflected twice |
| Answer» D. is reflected twice | |
| 1468. |
The refractive index assumes the entrance of light from |
| A. | glass |
| B. | water |
| C. | vacuum |
| D. | gas |
| Answer» D. gas | |
| 1469. |
White light is a mixture of |
| A. | seven colors |
| B. | nine colors |
| C. | fourteen colors |
| D. | fifteen colors |
| Answer» B. nine colors | |
| 1470. |
The water in ponds, lakes, streams and rivers is called fresh water because it is |
| A. | sweet |
| B. | tasteless |
| C. | bitter |
| D. | clean |
| Answer» C. bitter | |
| 1471. |
The average amount of water which a large deciduous tree takes, is |
| A. | 1000 liters |
| B. | 20,000 liters |
| C. | 5000 liters |
| D. | 50,000 liters |
| Answer» C. 5000 liters | |
| 1472. |
At treatment plant, raw water is mixed with alum and lime, it is called |
| A. | coagulation |
| B. | sedimentation |
| C. | filtration |
| D. | chlorination |
| Answer» B. sedimentation | |
| 1473. |
Hot water is bad for fish eggs to |
| A. | lay |
| B. | mature |
| C. | hatch |
| D. | grow |
| Answer» D. grow | |
| 1474. |
As the water evaporates, due to cold air it |
| A. | drops back |
| B. | condenses |
| C. | turns into liquid |
| D. | turns in gas |
| Answer» C. turns into liquid | |
| 1475. |
The taste of 'water' is |
| A. | sour |
| B. | bitter |
| C. | sweet |
| D. | tasteless |
| Answer» E. | |
| 1476. |
A cow drinks approximately |
| A. | 100 liters of water |
| B. | 135 liters of water |
| C. | 165 liters of water |
| D. | 200 liters of water |
| Answer» C. 165 liters of water | |
| 1477. |
One of the most common water washed diseases is known as |
| A. | Typhoid |
| B. | Diarrhea |
| C. | Trachoma |
| D. | Hepatitis |
| Answer» D. Hepatitis | |
| 1478. |
Poisonous substances from landfills can be washed away into rivers by |
| A. | flood |
| B. | rainwater |
| C. | underground river water |
| D. | |
| Answer» C. underground river water | |
| 1479. |
Waste chemicals and harmful metals like mercury make the water |
| A. | green |
| B. | stale |
| C. | stagnant |
| D. | poisonous |
| Answer» E. | |
| 1480. |
To prevent trachoma |
| A. | antibiotic medicines should be taken |
| B. | abiotic medicines should be taken |
| C. | biotic medicines should be taken |
| D. | plenty of water should be used to wash ourselves |
| Answer» E. | |
| 1481. |
Distillation is similar to a natural process known as |
| A. | nitrogen cycle |
| B. | carbon cycle |
| C. | water cycle |
| D. | sewage cycle |
| Answer» D. sewage cycle | |
| 1482. |
The percentage of water on earth is |
| A. | 0.5 |
| B. | 0.6 |
| C. | 0.7 |
| D. | 0.8 |
| Answer» D. 0.8 | |
| 1483. |
Oil on the feathers prevents |
| A. | birds from keeping themselves warm |
| B. | bugs from entering the bird's feathers |
| C. | cold air from entering the body |
| D. | dust to enter feathers |
| Answer» B. bugs from entering the bird's feathers | |
| 1484. |
Birds pollinated flowers have |
| A. | tube shaped flower |
| B. | bowl shaped flower |
| C. | bulb shaped flower |
| D. | plate shaped flower |
| Answer» B. bowl shaped flower | |
| 1485. |
After landing on stigma, the pollen grains |
| A. | burst and form a tube |
| B. | ripe and fall |
| C. | burst and spread more small pollens |
| D. | split and spread |
| Answer» B. ripe and fall | |
| 1486. |
The petals of the bird pollinated flowers have |
| A. | less nectar but large amount of scent |
| B. | large amount of nectar and scent |
| C. | less nectar and scent |
| D. | large amount of nectar but a little scent |
| Answer» E. | |
| 1487. |
The ball formed in a plant is known as |
| A. | zygote |
| B. | embryo |
| C. | endosperm |
| D. | seed |
| Answer» C. endosperm | |
| 1488. |
A part of plant which is found both in vegetable and fruit is known as |
| A. | tuber |
| B. | bud |
| C. | runner |
| D. | bulb |
| Answer» B. bud | |
| 1489. |
Asexual reproduction is also known as |
| A. | anti-sexual reproduction |
| B. | unisexual reproduction |
| C. | vegetative reproduction |
| D. | non vegetative reproduction |
| Answer» D. non vegetative reproduction | |
| 1490. |
The ball is surrounded by a special tissue known as |
| A. | zygote |
| B. | embryo |
| C. | endosperm |
| D. | seed |
| Answer» D. seed | |
| 1491. |
The ovule turns into a |
| A. | fruit |
| B. | flower |
| C. | ball of cells |
| D. | ball of pollen grains |
| Answer» D. ball of pollen grains | |
| 1492. |
For seeds the task of fruit is to |
| A. | keep them fresh |
| B. | protect them |
| C. | disperse them only |
| D. | protect and disperse them |
| Answer» E. | |
| 1493. |
Until the conditions are right for growth, the embryo remains |
| A. | wet |
| B. | dry |
| C. | dormant |
| D. | viable |
| Answer» D. viable | |
| 1494. |
The process of growth of seed in a plant is known as |
| A. | pollination |
| B. | reproduction |
| C. | germination |
| D. | fertilization |
| Answer» D. fertilization | |
| 1495. |
Pollen grains of wind pollinated flowers are |
| A. | sticky and light weight |
| B. | light weight and in a huge quantity |
| C. | light weight and huge |
| D. | sticky and huge |
| Answer» C. light weight and huge | |
| 1496. |
The transfer of pollen grains from anther to a stigma of different flowers in different plants is known as |
| A. | self reproduction |
| B. | cross reproduction |
| C. | self pollination |
| D. | cross pollination |
| Answer» E. | |
| 1497. |
There are more chances of survival of a plant if |
| A. | self pollination takes place |
| B. | cross pollination takes place |
| C. | inverse pollination takes place |
| D. | asexual reproduction takes place |
| Answer» C. inverse pollination takes place | |
| 1498. |
The correct order of parts of flower in original formation, one inside the other is |
| A. | sepals, stamens, petals and carpels |
| B. | stamens, sepals, petals and carpels |
| C. | carpels, stamens, petals and sepals |
| D. | sepals, petals, stamens and carpels |
| Answer» E. | |
| 1499. |
In a flute, the length of air cutting through the holes is changed by |
| A. | changing length |
| B. | changing valves |
| C. | fingers |
| D. | sealers |
| Answer» D. sealers | |
| 1500. |
The use of echo to measure distance is known as |
| A. | echo destination |
| B. | echolocation |
| C. | echo displacement |
| D. | echo dictation |
| Answer» C. echo displacement | |