Science 'N' us-5 final - School Books Publishers India

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Multiple Choice Questions(Based on chapters 1, 2 and 3)Choose the right option :1. The reason due to which living things react is called stimulus.(a) attraction(b) repulsion(c) stimulus✓(d) reproduction2. Plants are called autotrophs because they prepare their own food.(a) they respond toward stimuli(b) they breathe(c) they reproduce(d) they prepare their own food✓3. Venus flytrap is an example of insectivores plant.(a) parasitic plant(b) insectivorous plant ✓(c) non-green plant(d) a saprophyte4. A tiny plant inside the seed is called embryo.(a) seed coat(b) embryo✓(c) micropyle(d) bud5. Which of the following is not an agent of seed dispersal?(a) wind(b) water(c) sun✓(d) animals6. Which of the following reproduce through vegetative propagation?(a) papaya(b) mango(c) peas(d) rose✓7. Bat is a nocturnal animal.(a) Lion(b) Bat✓(c) Dog(d) Sparrow8. Emu is a flightless bird.(a) Emu✓(b) Crow(c) Sparrow(d) Pigeon9. Fish breathe through gills.(a) lungs(b) moist skin(c) gills✓(d) scales10. Carnivores have long sharp, pointed teeth, strong claws, sharp nails.(a) Carnivores ✓(b) Herbivores(c) Omnivores(d) ParasitesHorizon Press111Science 'n' Us - 1 to 5
4.HUMAN SKELETONExerciseA. Answer the following questions :1. What is a skeleton?Ans. Our body is a framework of bones. This framework is known as skeleton.2. What is the importance of skeleton in human body?Ans. Skeleton is very important to us as it enables us to walk, stand and run.It gives a beautiful shape to our body.3. Which organs are protected by :(a) skull (b) ribcage (c) backboneAns. (a) Skull : The skull is a combination of both small and large sizedbones. These bones can be divided into two categories- bones of headand facial bones. In the head, there is a brain cover which protects thebrain. Facial bones include the bones of eyes, ears, nose and jaws.(b) Ribcage : Its function is to protect heart and lungs, etc.(c) Backbone : The backbone protects the spinal cord.4. What is a joint?Ans. The place where two bones meet with each other is known as a joint.5. Differentiate between :(a) voluntary and involuntary muscles(b) pivot joint and hinge jointAns. (a) Voluntary and involuntary muscles :Those muscles which we can move by out own choice are calledvoluntary muscles.Those muscles which we cannot move by our choice are calledinvoluntary muscles.(b) Pivot joint and hinge joint :Our skull is connected to the first two vertebrae of the spine with a pivotjoint. With the help of this joint, we can move our head up and down andfrom side to side.The joint in which only unidirectional movement of the bones ispossible is called a hinge joint.B. Match the following :Body organsJoints1. knee (a) immovable joint2. shoulder (b) gliding joint3. wrist (c) ball and socket joint4. skull (d) hinge jointHorizon Press112Science 'n' Us - 1 to 5
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Page 15 and 16: Fun Time Activity1. Prepare a diet
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