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.
| 201. |
Esophagus is also called |
| A. | alimentary canal |
| B. | stomach |
| C. | gullet |
| D. | belly |
| Answer» D. belly | |
| 202. |
When hot lava comes out of Earth's surface it loses its |
| A. | heat |
| B. | shape |
| C. | state |
| D. | volume |
| Answer» B. shape | |
| 203. |
The heat which in in the form of infra-red waves, emitted in all the directions at the speed of light is |
| A. | conduction |
| B. | convection |
| C. | radiation |
| D. | expansion |
| Answer» D. expansion | |
| 204. |
Cables are kept away from expansion and sagging by giving |
| A. | rollers |
| B. | sliding joints |
| C. | allowance |
| D. | contraction joint |
| Answer» D. contraction joint | |
| 205. |
When the energy is carried by circulating current of particles within a liquid or gas it is |
| A. | conduction |
| B. | convection |
| C. | radiation |
| D. | expansion |
| Answer» C. radiation | |
| 206. |
A solid, liquid or gas loses its heat when the temperature is |
| A. | increased |
| B. | decreased |
| C. | constant |
| D. | higher |
| Answer» C. constant | |
| 207. |
Rocks are formed by combination of minerals like |
| A. | quartz |
| B. | feldspar |
| C. | calcite |
| D. | all of them |
| Answer» E. | |
| 208. |
When water containing dissolved salts evaporate there is formation of layer of |
| A. | salts |
| B. | rocks |
| C. | sediments |
| D. | minerals |
| Answer» D. minerals | |
| 209. |
In deserts there is existence of extreme in day and night |
| A. | temperatures |
| B. | erosion |
| C. | pressure |
| D. | cycles |
| Answer» B. erosion | |
| 210. |
Sediments are transported and deposited by help of |
| A. | water currents |
| B. | stagnant water |
| C. | water ponds |
| D. | water dams |
| Answer» B. stagnant water | |
| 211. |
The outer layer of human skin is composed of |
| A. | mucus |
| B. | collenchymas cells |
| C. | dead cells |
| D. | transporting cells |
| Answer» D. transporting cells | |
| 212. |
A fungus which is used to make antibiotic is called |
| A. | mould |
| B. | yeast |
| C. | penicillium |
| D. | hyphae |
| Answer» D. hyphae | |
| 213. |
Germs on floor and non-living things are destroyed by |
| A. | antiseptic |
| B. | disinfectants |
| C. | both a and b |
| D. | antibiotics |
| Answer» C. both a and b | |
| 214. |
AIDS, poliomyelitis, rabies, rubella are all |
| A. | viral |
| B. | bacterial |
| C. | fungal |
| D. | yeast |
| Answer» B. bacterial | |
| 215. |
Sweat, saliva, tears and mucus have |
| A. | lysosomes |
| B. | chromosomes |
| C. | ribosome |
| D. | Golgi bodies |
| Answer» B. chromosomes | |
| 216. |
Decay is the breaking down or decomposition of |
| A. | waste matter |
| B. | birds |
| C. | animals |
| D. | fish |
| Answer» B. birds | |
| 217. |
A change in food web to any population have effect on |
| A. | other population |
| B. | abiotic factors |
| C. | water |
| D. | trees |
| Answer» B. abiotic factors | |
| 218. |
Organisms which breakdown dead or waste matter in to simpler substances are termed as |
| A. | producers |
| B. | consumers |
| C. | decomposer |
| D. | scavengers |
| Answer» D. scavengers | |
| 219. |
Plants-----> Caterpillar-------> birds is example of |
| A. | food web |
| B. | food chain |
| C. | food cycle |
| D. | ecosystem |
| Answer» C. food cycle | |
| 220. |
A network of interconnected food chains is called |
| A. | food web |
| B. | web cycle |
| C. | chain web |
| D. | ecosystem |
| Answer» B. web cycle | |
| 221. |
Virtual and literally inverted images are produced by a |
| A. | plane mirror |
| B. | glass |
| C. | cellophane |
| D. | camera |
| Answer» B. glass | |
| 222. |
The speed of light in a vacuum is |
| A. | 300000000m/s |
| B. | 400000000m/s |
| C. | 600000000m/s |
| D. | 900000000m/s |
| Answer» B. 400000000m/s | |
| 223. |
The darker region in shadow with well-defined outline is called |
| A. | umbra |
| B. | penumbra |
| C. | screen |
| D. | source |
| Answer» B. penumbra | |
| 224. |
Parallel rays falling on rough surface will produce rays which are |
| A. | scattered |
| B. | smooth |
| C. | beams |
| D. | parallel |
| Answer» B. smooth | |
| 225. |
Light cannot reach behind an object because it cannot |
| A. | bend |
| B. | rotate |
| C. | flexible |
| D. | all of them |
| Answer» E. | |
| 226. |
Ability to eat away germ is specialty of |
| A. | red blood cell |
| B. | white blood cell |
| C. | liver |
| D. | plasma |
| Answer» C. liver | |
| 227. |
To fight against diseases human beings have special |
| A. | natural barriers |
| B. | immune system |
| C. | both a and b |
| D. | antibiotics |
| Answer» D. antibiotics | |
| 228. |
The bacteria which have ability to convert milk sugar in to lactic acid is called |
| A. | lactobacillus |
| B. | streptococcus |
| C. | gram positive bacteria |
| D. | gram negative bacteria |
| Answer» B. streptococcus | |
| 229. |
The vectors which conduct germs includes |
| A. | fleas |
| B. | tick |
| C. | lice |
| D. | all of them |
| Answer» E. | |
| 230. |
Germs spread in the form of |
| A. | clusters |
| B. | droplets |
| C. | gases |
| D. | air |
| Answer» C. gases | |
| 231. |
The 70% of our body mass is |
| A. | water |
| B. | air |
| C. | blood |
| D. | nerves |
| Answer» B. air | |
| 232. |
Distended belly with loss of body fat are the characteristics of |
| A. | scurvy |
| B. | beri beri |
| C. | Kwashiorkor |
| D. | rickets |
| Answer» D. rickets | |
| 233. |
Alimentary canal, liver, pancreas and gall bladder altogether constitutes |
| A. | Human digestive system |
| B. | frog digestive system |
| C. | rabbit digestive system |
| D. | lizard digestive system |
| Answer» B. frog digestive system | |
| 234. |
There are different types of amino acids which are in number |
| A. | 12 |
| B. | 2 |
| C. | 5 |
| D. | 20 |
| Answer» B. 2 | |
| 235. |
Vitamins, minerals and proteins in suitable amounts are given to body by |
| A. | whole grain food |
| B. | fatty fish |
| C. | plant oil |
| D. | nuts |
| Answer» E. | |
| 236. |
Light travels at different speeds in different |
| A. | medium |
| B. | situations |
| C. | amount |
| D. | objects |
| Answer» B. situations | |
| 237. |
Materials which do not allow any light to pass through them are called |
| A. | transparent |
| B. | translucent |
| C. | opaque |
| D. | semi-absorbent |
| Answer» D. semi-absorbent | |
| 238. |
Convex mirror produces image which is |
| A. | virtual |
| B. | upright |
| C. | diminished |
| D. | all of them |
| Answer» E. | |
| 239. |
The bending of light sometimes give us wrong impression of |
| A. | depths |
| B. | heights |
| C. | volume |
| D. | shape |
| Answer» B. heights | |
| 240. |
A beam of light is made up of bundle of |
| A. | rays |
| B. | droplets |
| C. | clusters |
| D. | groups |
| Answer» B. droplets | |
| 241. |
Producers, consumers and decomposers are dependent on each other for their |
| A. | growth |
| B. | reproduction |
| C. | breathing |
| D. | survival |
| Answer» E. | |
| 242. |
Soft portion of carcass of a dead lion is feed for |
| A. | vultures |
| B. | hyenas |
| C. | both a and b |
| D. | crocodile |
| Answer» D. crocodile | |
| 243. |
The rest of dead body left after consumers feed is |
| A. | disappeared |
| B. | decomposed |
| C. | reacted |
| D. | spread |
| Answer» C. reacted | |
| 244. |
Carnivores and omnivores are considered as |
| A. | producers |
| B. | consumers |
| C. | primary consumers |
| D. | secondary consumers |
| Answer» E. | |
| 245. |
According to pyramid of numbers the number of producer is greater than number of |
| A. | herbivores |
| B. | carnivores |
| C. | omnivores |
| D. | scavengers |
| Answer» B. carnivores | |
| 246. |
A sheet of muscles which contracts or flatten when we breathe is called |
| A. | diaphragm |
| B. | ribs |
| C. | lungs |
| D. | stomach |
| Answer» B. ribs | |
| 247. |
The function of white blood cells is to provide |
| A. | support |
| B. | immunity |
| C. | nutrients |
| D. | transport gases |
| Answer» C. nutrients | |
| 248. |
The process by which energy is released from glucose or other food molecules in the cell of living organisms is called |
| A. | respiration |
| B. | transpiration |
| C. | digestion |
| D. | defecation |
| Answer» B. transpiration | |
| 249. |
The process by which glucose reacts with oxygen in cells in order to release energy gradually is called |
| A. | cellular respiration |
| B. | aerobic respiration |
| C. | anaerobic respiration |
| D. | breathing |
| Answer» C. anaerobic respiration | |
| 250. |
Capillaries are |
| A. | thin |
| B. | transfer oxygen |
| C. | transfer digested food |
| D. | all of them |
| Answer» E. | |