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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.
| 1251. |
Hubble telescope is powered by |
| A. | one small solar panel |
| B. | two small solar panels |
| C. | one large solar panel |
| D. | two large solar panels |
| Answer» E. | |
| 1252. |
Unfortunately, Ulysses' orbit is taking it more further away from the |
| A. | Moon |
| B. | Mars |
| C. | Sun |
| D. | Earth |
| Answer» E. | |
| 1253. |
The number of red cells in an eye is |
| A. | 320 million |
| B. | 120 million |
| C. | 220 million |
| D. | 200 million |
| Answer» C. 220 million | |
| 1254. |
We can see things because light |
| A. | is absorbed by objects |
| B. | enters our eyes |
| C. | reflects from our eyes |
| D. | is colorless |
| Answer» C. reflects from our eyes | |
| 1255. |
Mirages are more common in |
| A. | rainforests |
| B. | dry forests |
| C. | deserts |
| D. | highlands |
| Answer» D. highlands | |
| 1256. |
Filter absorbs |
| A. | only primary colored lights |
| B. | secondary colored lights |
| C. | tertiary colored lights |
| D. | all colors of white light |
| Answer» E. | |
| 1257. |
Screens of monitors and televisions are made by |
| A. | red dots |
| B. | red, yellow and green dots |
| C. | red, green and blue dots |
| D. | white dots |
| Answer» D. white dots | |
| 1258. |
If bacteria are taken over by white blood cells, their life span |
| A. | decreases |
| B. | increases |
| C. | remains same |
| D. | may increase or decrease |
| Answer» B. increases | |
| 1259. |
The deoxygenated blood is pumped to |
| A. | arteries |
| B. | lungs from heart |
| C. | heart from lungs |
| D. | veins |
| Answer» C. heart from lungs | |
| 1260. |
Yellow pus in the wound is actually |
| A. | red blood cells |
| B. | plasma |
| C. | platelets |
| D. | infected white blood cells |
| Answer» E. | |
| 1261. |
The task of white blood cells is to |
| A. | defend a body from disease |
| B. | transport oxygen |
| C. | heal wounds |
| D. | refresh heart |
| Answer» B. transport oxygen | |
| 1262. |
Rutherford's Model explains that atom has a nucleus which is surrounded by |
| A. | protons |
| B. | electrons |
| C. | neutrons |
| D. | nuclear energy |
| Answer» C. neutrons | |
| 1263. |
The major part of an atom is |
| A. | empty |
| B. | filled |
| C. | charged |
| D. | covered |
| Answer» B. filled | |
| 1264. |
As compare to hydrogen atom, helium atom is |
| A. | very small |
| B. | very massive |
| C. | medium in mass fraction |
| D. | same in volume |
| Answer» C. medium in mass fraction | |
| 1265. |
Ammonia molecule contains one nitrogen atom and three atoms of |
| A. | hydrogen |
| B. | helium |
| C. | nitrogen |
| D. | carbon |
| Answer» B. helium | |
| 1266. |
"O3" is a chemical formula of |
| A. | oxygen |
| B. | oxides |
| C. | ozone |
| D. | acid rain |
| Answer» D. acid rain | |
| 1267. |
Protons have |
| A. | positive charge |
| B. | negative charge |
| C. | no charge |
| D. | double charge |
| Answer» B. negative charge | |
| 1268. |
In series, if one bulb goes out, others will |
| A. | stay on |
| B. | also turn off |
| C. | blow up |
| D. | heat up |
| Answer» C. blow up | |
| 1269. |
The scientist who discovered relation between electricity and magnetic field was |
| A. | French |
| B. | Spanish |
| C. | Danish |
| D. | British |
| Answer» D. British | |
| 1270. |
Circuit breakers work |
| A. | constantly |
| B. | only once |
| C. | when there is resistance |
| D. | when there is magnetic field |
| Answer» B. only once | |
| 1271. |
To and fro movement of coil makes the cone |
| A. | thin |
| B. | thick |
| C. | vibrate |
| D. | oscillate |
| Answer» D. oscillate | |
| 1272. |
Ancient people believed that constellations were |
| A. | useless |
| B. | useful |
| C. | special |
| D. | galaxies |
| Answer» D. galaxies | |
| 1273. |
How many constellations are there in the sky? |
| A. | 40 |
| B. | 88 |
| C. | 45 |
| D. | 80 |
| Answer» C. 45 | |
| 1274. |
The gravity of a black hole is so high, even light cannot escape |
| A. | escape |
| B. | trap |
| C. | control |
| D. | all of above |
| Answer» D. all of above | |
| 1275. |
Many stars give out more |
| A. | ultraviolet light |
| B. | visible light |
| C. | infrared light |
| D. | non visible light |
| Answer» D. non visible light | |
| 1276. |
When last star would shine and die, the universe will turn |
| A. | extremely hot |
| B. | extremely cold |
| C. | very small |
| D. | even larger |
| Answer» C. very small | |
| 1277. |
Leaf looks green because it absorbs |
| A. | all colors except green |
| B. | green color and reflects others |
| C. | red and yellow color |
| D. | blue and yellow color |
| Answer» B. green color and reflects others | |
| 1278. |
If light enters a dense object in angle of zero, it would |
| A. | bend |
| B. | reflect back |
| C. | go straight |
| D. | turn towards right |
| Answer» D. turn towards right | |
| 1279. |
Filters do not |
| A. | change the light |
| B. | change the color |
| C. | change the primary colors |
| D. | change the secondary colors |
| Answer» C. change the primary colors | |
| 1280. |
The angle between the normal ray and the ray leaving a medium is known as |
| A. | critical angle |
| B. | angle of incidence |
| C. | angle of reflection |
| D. | angle of refraction |
| Answer» E. | |
| 1281. |
The symbol of "Helium" is |
| A. | H |
| B. | He |
| C. | Na |
| D. | Hy |
| Answer» C. Na | |
| 1282. |
The symbol of "Boron" is |
| A. | Bo |
| B. | C |
| C. | N |
| D. | Br |
| Answer» B. C | |
| 1283. |
In nuclear power plants, energy is released |
| A. | quickly |
| B. | slowly |
| C. | normally |
| D. | very quickly |
| Answer» C. normally | |
| 1284. |
A large amount of heat is produced in power plants when energy is released which turns |
| A. | black rods into orange |
| B. | water into steam |
| C. | ice into water |
| D. | acid into alkali |
| Answer» C. ice into water | |
| 1285. |
Atoms of sodium and chlorine are stuck by chemical glue which is known as |
| A. | bond |
| B. | alpha gum |
| C. | force of glue |
| D. | atomic gum |
| Answer» B. alpha gum | |
| 1286. |
If someone carrying a knife or gun passes through a detector, it alters the rate of |
| A. | current |
| B. | voltage |
| C. | resistance |
| D. | magnetic field |
| Answer» E. | |
| 1287. |
Current can only flow if there is a closed circuit |
| A. | open circuit |
| B. | closed circuit |
| C. | series circuit |
| D. | parallel circuit |
| Answer» B. closed circuit | |
| 1288. |
Compared to long thick wire of copper, the short but thick wire would have |
| A. | more resistivity |
| B. | less resistivity |
| C. | equal resistivity |
| D. | may have more or less resistivity |
| Answer» C. equal resistivity | |
| 1289. |
A magnet may attract or repel by |
| A. | another magnet |
| B. | electric current |
| C. | resistor |
| D. | dynamo |
| Answer» B. electric current | |
| 1290. |
An instrument that gives an accurate measurement of the electric current flowing in a circuit is known as |
| A. | voltmeter |
| B. | galvanometer |
| C. | barometer |
| D. | ammeter |
| Answer» E. | |
| 1291. |
A material which is made up of one type of atom is known as |
| A. | element |
| B. | compound |
| C. | mixture |
| D. | molecule |
| Answer» B. compound | |
| 1292. |
'Chlorine' becomes an anion because |
| A. | it loses a proton |
| B. | it gains a proton |
| C. | it loses an electron |
| D. | it gains an electron |
| Answer» E. | |
| 1293. |
In element Uranium-235, the combined number of neutrons and protons is |
| A. | 92 |
| B. | 235 |
| C. | 35 |
| D. | 200 |
| Answer» C. 35 | |
| 1294. |
The activity of organs in a human body can be studied by |
| A. | injected medicines in the body |
| B. | injected chip in human body |
| C. | injected radioisotope in human body |
| D. | injected monitors in the body |
| Answer» D. injected monitors in the body | |
| 1295. |
When the transfer of electrons takes place, the sodium and chlorine atoms turn into |
| A. | ions |
| B. | electrons and protons |
| C. | positrons and negatrons |
| D. | neutrons and photons |
| Answer» B. electrons and protons | |
| 1296. |
If a radiator is installed in a room, it warms air by the process of |
| A. | conduction |
| B. | convection |
| C. | radiation |
| D. | warming |
| Answer» C. radiation | |
| 1297. |
To prevent loss of heat through walls, the walls must be |
| A. | insulated |
| B. | conducted |
| C. | painted black |
| D. | painted dull |
| Answer» B. conducted | |
| 1298. |
The circulating movement of air is known as |
| A. | conduction current |
| B. | convection current |
| C. | radiation current |
| D. | air current |
| Answer» C. radiation current | |
| 1299. |
The good conduction of heat by metals is due to |
| A. | collision of particles |
| B. | arrangement of particles |
| C. | vibration of particles |
| D. | size of particles |
| Answer» D. size of particles | |
| 1300. |
The light that is refracted the most, is |
| A. | violet light |
| B. | red light |
| C. | blue light |
| D. | orange light |
| Answer» B. red light | |