DAV SCIENCE CLASS IV

SUBJCT-SCIENCE TOPIC-BIRDS-BEAKS AND CLAWS WORKSHEET-5       STD-IV NAME---------------------------------------------------------             SEC ----------- Q.1. Tick the correct option. a)  It is a climbing bird- i) Parrot  ii) Hen   iii) Crane  iv) Sparrow b) A bird that takes out insects and worms from the holes in the ground-                  i) Woodpecker  ii)Crane  iii) Sunbird    iv) Hoopoe c) A bird that does not have sharp claws, is the i) Swan  ii) Vulture  iii) Hawk  iv) Eagle d) A bird that can curl the toes around the branch and hold it firmly- i)Penguin ii) Crow iii) Crane iv) Hen  Q.2 Fill in the blanks. a) Birds use  their ____________ to tear, bite or crush the food. b) A pigeon has a ________________ beak. c) _______________ can imitate the voice of human beings. d) A ____________ can catch the insects while flying with its sticky beak. Q.3 Express in one  or two words. a) The process of cleaning the feathers and setting them r

SUBJCT-SCIENCE TOPIC-PLANTS AROUND US WORKSHEET-4        STD-IV NAME---------------------------------------------------------             SEC ----------- Q.1. Tick the correct option. a)This plant increases the oxygen content of water- i)Duckweed   ii)Water lily   iii)Hydrilla   iv) None of them b)Which of the  following plants grow on the hills?                                                     i) Deodar  ii)Mango  iii) Cactus   iv) peepal c)This plant has spines instead of leaves. i) Coconut  ii)Rose  iii)Cactus  iv) Pine d) Preparation of the soil is followed by- i) Harvesting  ii) Sowing  iii) Storage  iv) Irrigation  Q.2 Fill in the blanks- a)The natural home of living things is called its_________________. b)ploughing is done by using____________________. c)The trees that shed their leaves gradually are called as ______________ trees. d)The plants which grow in water are called as ___________ plants. e) Hydrilla  increases ____________ cont

SUBJCT-SCIENCE TOPIC-PLANTS WORKSHEET-2      STD-IV NAME---------------------------------------------------------             SEC ----------- Q.1. Tick the correct option. a)This part of the plant helps in soil conservation. i) Fruits          ii) Root     iii) Leaf    iv) Stem b) Which of the following is not an edible root? i) Potato   ii) Beans  iii) Kamal kakri      iv)All of these c) The type of root present in wheat plant--- i) Tap root  ii) Edible root    iii) Aerial root   iv) Fibrous root Q.2 Fill in the blanks a) A __________ root tends to taper downwards. b) The air surrounding the earth is known as ______________. c) The roots found in banyan and maize plants are known as__________  roots. d) _____________ and _____________ are two main functions of the roots. e) Leaf has ____________ in it to prepare food . Q.3 Name two of each: a) Roots which store food         i)__________________    ii)__________________ b) plants having aerial

SUBJCT-SCIENCE WORKSHEET-1        STD-IV NAME---------------------------------------------------------             SEC ----------- Q.1. Tick the correct option. a)The number of salivary glands present in our mouth : i) two pairs          ii) one pair     iii) three pairs     iv) four pairs b) The length of small intestine is approximately________ i) 4 metres   ii) 5 metres   iii) 7 metres     iv) 6 metres c) The process in which food materials are broken down into simpler forms is called_____ i) respiration   ii) digestion   iii) excretion   iv) nutrition d) The largest gland in our body is ___________ i) pancreas   ii) stomach    iii) intestine  iv) liver e)The organ in which absorption of water takes place  i)large intestine  ii)stomach   iii) oesophagus   iv) small intestine f) Cooking makes the food ________ i) digestible   ii) tasty  iii) soft   iv) all of these Q.2 Fill in the blanks a) The milk teeth fall one by one between the age of ______

BIRDS –BEAKS AND  CLAWS D1. Ans: Birds  use their beaks for preening their feather. D2.How is a crushing beak helpful to a pigeon? Ans:A crushing  beak is a short and hard beak.It helps the pigeon for crushing seeds and grains .so that the seeds will soft for eating. D3.What are claws? Ans: Claws are the long curved nails present on the feet of birds. D4.Name three birds of prey. Ans: Eagle, vulture and hawk are examples three birds of prey. D5.What prevents the body of  crane and jacana from sinking in water? Ans:The wide spreading toes of crane & jacana help them from sinking in water. E1.Write two main uses of a beak of a bird. Ans.Two main uses of beaks of a bird are: i)Beaks of birds are used for tearing, biting or  crushing the foods . ii)beaks of birds also help to fight the enemy or catch the prey. E2.How  claws helpful to a bird? Ans: Claws help a bird for climbing, protecting, holding food, swimming and perching. E3.How does a swallow c

Flower & Fruits D1.State any two uses of flowers. Ans: Two uses of flowers are: 1) Flower extraction is used for perfume 2) Flowers are used to make herbal colours. D2.How do green leaves help a bud? Ans: The green leaves protect the bud and help it to bloom into a flower. D3. Name two flowers which are eaten as vegetables. Ans: Two flowers which are eaten as vegetables are- 1)     Cauliflower 2) pumpkin flower. D4.Name any three dry fruits.Write two ways in which they are used in our daily life. Ans: Name of three dry fruits is cashew nuts, dates &raisins. Uses of dry fruits: Cashew nuts: Fry cashew nuts are used in kheer. Dates: Dates are used to make chutney. Raisins : Are used in upma as well as in kheer. E1. Write five lines about flowers 1)Flower is a colourful and beautiful part of a plant. 2)flower generally has a pleasant fragrance. 3)Most flowers have attractive colours and some are colourless. 4)Flowers are used for differen

Plants:Around us A.1 conical 2.mango &banyan 3.pneumatophore/aerial roots 4.HYDRILLA 5.vegetable(KAMAL KAKARI) D1.What are terrestrial plants? Ans: Plants which grow on land are called terrestrial plants. D2.How does the conical shape help the plants of hills? Ans:The conical shape of  plants of hills  does not allow snow to get deposited on them. D3.Name two trees growing in hot and wet regions. Ans: Trees like rubber and teak grow in hot and wet regions. D4.Name an underwater plant. What kind of leaves does it have? Ans:Hydrilla is an example of underwater plant. It has pointed and strap-like leaves.. D5.what is ploughing? Ans:The preparation of soil by digging with help of wooden  plough or tractor  to lose  & make  soft is called ploughing. E1.List the different habitats of terrestrial plants? Ans:The habitats of terrestrial plants are: i)hills ii)plains iii)Desert iv)hot & wet regions v)Marshy areas. E2.How is cactus plant able t