DAV SCIENCE CLASS V

Our Solar System D1. Name the hottest planet in our solar system.    Is it closest to the sun? Ans: Venus is the hottest planet in our solar system. No Venus is not the closest planet to the sun mercury is the closest one. D2.How much time does the earth take to               (i) Revolve once around the sun               (ii)To complete one rotation about its own axis. Ans;(i) Earth takes  365 days and 6 hours to revolve once around the sun. (ii)Earth takes 23 hours 56 minutes to complete one rotation about its own axis. D3.State the nature of the shape of the orbit of planets. Ans: The shape of the orbit of planets is elliptical. D4. Write the meaning of the artificial satellites. Ans: Artificial satellites are man-made objects which can be made to revolve around the earth to perform various ta...

SPOILAGE AND WASTAGE OF FOOD AND FOOD PRESERVATION QD.Answer the following questions in brief. 1.State two factors that contribute to the fast growth of micro-organisms. Ans: Two factors that contribute to the fast growth of micro-organisms are moisture and temperature. 2.What   is likely to happen to curd if it is not stored in the refrigerator? Ans:If curd is not stored in refrigerator ,it will get spoiled   quickly due to growth of micro-organisms. 3.What do you understand by food preservation? Ans:Food preservation is the process of treating and handling   of food to stop or slow down ,the spoilage caused by micro-organisms or enzymes. 4. How can we protect our food from insects, worms and rats? Ans: To protect our food items insects, worms and rats we should keep the kitchen, cupboard, shelves and container clean and dry. 5.Why does food stay fresh for a longer time   when stored in a refrigerator? Ans: Refrigerator has the facility to ...

DAV PUBLIC SCHOOL, CHANDRASEKHARPUR CLASS-V                         WORKSHEET    -5                                 SUB:SCIENCE NAME……………………………………………………SECTION……ROLL NO…………….   Choose the most appropriate answer (Question no 1 to 11) 1. Which of these is energy -giving nutrients? (a)vitamins &mineral (b)carbohydrates   & fats          (c)protein & fats (d)vitamins &carbohydrates. 2. Which of the following is a communicable disease? (a)Goitre          (b) rickets         (c) anaemia      (d) cholera 3. Which vitamin is known as thiamin...

FOOD AND HEALTH Ans: D1.The two main categories of diseases are communicable and non-communicable. D2.The symptoms are extreme weakness and paralysis of body parts. D3.The diseases that spread through mosquitoes are malaria and dengue. D4.The girl who find difficult to see in dim light and has dry and scaly skin is suffering from vitamin A deficiency diseases. D5.Water should not be allowed to stagnant around our homes because stagnant water is a suitable place of breeding   of   mosquitoes. E1.Calcium and phosphorous are building bulk of bone and teeth. Deficiency of calcium and phosphorous in our body make our teeth weak, loss of shines and whiteness of teeth. It also makes our bone weak, soft and fragile. E2.The deficiency diseases can be prevented by adopting the following measures: Ø One should take a balanced diet containing all types of nutrients. Ø One must follow good food practices and habits. Ø Children must be given adequate amount of ...

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Read the story very carefully and a quiz will be done on story in coming week. Henry: A Chameleon This is story of Henry, Our pet Chameleon.  Chameleon are in a class by themselves and are no ordinary reptiles. They are easily distinguished from their nearest relatives, Like lizards, By certain outstanding features. A chameleon's tongue is as long as its body. Its limbs are long and slender and its fingers and toes resemble a parrot's claws. On its head may be any of several ornaments. Henry had a rigid crest that looked like a fireman's helmet. Henry's eyes were his most remarkable feature. they were not beautiful, but his left eye was quite independent of his right. He could move one eye without disturbing the other. Each eyeball, bulging out of his head, wobbled up and down, backward and forward. This frenzied movement gave Henry a horrible squint. And one look into Henry's frightful gaze was often enough to scare people into...