DAV SCIENCE STD III

Plant A.1 .stem 2.trunk 3.Herb        4.Creepers 5.money B.1.Tree-mango 2.Herb-Tomato 3.shrub-rose 4.climber-pea plant 5.creeper-bitter gourd C.1.tree      c2.fruit       c3.shrub D1. State the functions of a leaf. Ans: The leaf prepares food for the plant by the process of photosynthesis. D2. Write the role of the roots of a tree. Ans: Root fixes the plant in the soil. It also absorbs water and mineral for the plant. D3.What type of stem do climbers have? Ans: The stem of climbers is very weak and thin. Climbers can‘t stand and grow straight on their own. D4.State the difference between the stem of a shrub and a herb Ans: The stem of shrub is woody but not of very strong where as the stem of   herb is not woody and very weak as compare to shrub. E2. Write any three features of tree. Ans: The features of a tree are: 1) The stem of the tree is woody and...

DAV PUBLIC SCHOOL, C.S PUR, BBSR-21 STD-III                 SUB-SCIENCE                WORKSHEET-3 Name-_______________________sec-______Date-_______________ Q.1 Choose and encircle the correct option- a) Curry leaves are good for- i. skin   ii. Eyesight       iii. Lungs          iv. None of these b) Basil is also known as- i. Pudina          ii. Dhania         iii. Tulsi                        iv. Methi c) Leaves differ in their – i. shape                ...

  WATER D1.Name two main natural sources of water. Ans: Two main natural sources of water are rain and snow. D2.Name any three inland water bodies. Ans: Three inland water bodies are pond, lake and river. D3.Write one use of water in canals. Ans: Canals water are mainly used for irrigation. D4.Name two main rivers of north India. Ans: Ganga and Brahmaputra are two main rivers of north India. D5.State two method of drawing ground water. Ans: Ground water can be drawn by help of Rehat and Pulley. E1.How is snow a source of water? Ans:In winter ,there is normally heavy snow fall on the mountains. During summer a part of this snow melts and changes into water. This water flows down the mountains into rivers and lakes which become  main sources of water for people.  E2.How is a dam useful for generating electricity? Ans: In a dam huge amount river water are stored. The stored water is allowed to fall from a high place which rotates the turbine and...

IMPORTANCE OF PLANTS EXTRA QUESTIONS ANSWER Q1.Who are known as the air purifier? Ans:Plants are  known as the air purifier. Q2.What is deforestation? Ans: Reckless cutting down of trees is called deforestation. Q3.What is afforestation? Ans: Planting large number of trees is called afforestation. Q4.What is soil erosion? Ans: Removal of top soil by air or water   is called soil erosion. Q5.Which gas is necessary for breathing? Ans: Oxygen  gas is highly necessary for breathing. Q6.What is Vanmahotsav? Ans: Vanmahotsav is  a festival of planting trees and  creating  awareness among  the people of  India Q7.When do Vanmahotsav is celebrated in India? Ans: Vanmahotsav is celebrated from 2 nd July to 9 th July for one week in India. Q8.Who   initiated Vanmahotsav in India? Ans:Dr K.M.Munish  the Union Minister of Food and agriculture had initiated Vanmahotsav in 1950 in India. Q9.Write five...

D1. What does a leaf do for the plant? Ans;A leaf prepares food for the plant by the process of photosynthesis. So leaf is called the kitchen of the plant. D2.To what use were some   leaves put by saints in olden days? Ans:In olden days saint uses some leaf like palm leaf to write poem, verse, sloka , epic & documents. D3.State  two uses of leaves in our food. Ans:Two uses of leaves in our food are:- 1)leaves like coriander &curry leaves are used to garnish the food. 2)leaves like mustard & methi are  used as vegetable. D4.Name any two articles where one can find leaf designs. Ans:The two articles where one can find leaf design are saree Border  and curtain. D5.How is   compost useful for plants and crops? Ans:The compost helps the plant and crop to grow better without affecting the soil fertility. E1.State any three uses of leaves. Ans: Three uses of leaves are- 1)Leaves like coriander and curry leaf are u...

My body D1.Name all the sense organs. Ans: The sense organs of human body are: 1)eye 2)Nose   3)tongue          4)ear   5)skin D2.what does our nose help us to do  ? Ans: Our nose helps us to smell different types of fragrances .It can differentiate between good and bad smells. D3.what types of sound are differentiated by our ears? Ans: our ear can differentiate between loud and gentle sounds and pleasant and unpleasant sounds. D4.Why should we meditate and exercise regularly? Ans: We should meditate and exercise regularly to keep us healthy and fit. E1.Name the different types of tastes. Draw a diagram of a tongue showing all its taste related parts. Ans: There are four different types of taste like sweet, sour, salty and bitter. E2.How eyes are useful to us? Ans: Eyes are useful to us in the following ways: 1) they help us to see various objects around us 2) they help us to get idea...