Science 'N' us-3 final - School Books Publishers India

More documents

Recommendations

Info

Fill up the boxes to complete the flowchart :Cellstissuesorganorgan systemskeletal systemrespiratorydigestive systemmuscular system excretory systemcirculatorynervous systemreproductivesystemLet us EnjoyEnjoy to fill the organ-table :Skeletal System bonesNervous System brain, nervesRespiratory System nose, trachea, lungsCirculatory System heart, blood, blood vesselsMuscular System musclesExcretory System kidneys, lungs, skinDigestive System mouth, food pipe, stomach, smallintestine, large intestineFun Time Activity1. Put some things on a table. Shut your eyes and guess what they are bytouching them.Ans. Do yourself.2. Draw any one organ system in the space given here :(See space in text-book)Ans. Do yourself.11.OUR TEETHExerciseA. Answer the following questions :1. Write three functions of teeth.Ans. Teeth have three main functions :(i) To chew the food.(ii) To give a shape to our face.(iii) To help us in speaking clearly.2. What are permanent teeth?Ans. Those teeth which replace milk teeth are called permanent teeth.Horizon Press60Science 'n' Us - 1 to 5
3. What is the function of incisors?Ans. Incisors are used to cut the food. These teeth are called cutting teeth also.4. What is the function of molars? Where are they present in our mouth?Ans. Molars are used to grind the food. They are present at the back of ourmouth. There are three molars on each side of the jaw.5. How do teeth decay?Ans. Whenever we eat anything, some pieces of it are always caught and leftin between our teeth. Over the period of time, they start rotting. Thisdamages the tooth. When this situation prevails, the gum to getsinfected and the tooth finally falls after getting loose. This process ofdamaging the teeth is called teeth decay.6. Write two habits to protect teeth against damage.Ans.(i) We should brush twice a day.(ii) Mouth should be properly washed after everything we eat.B. Choose the correct word from side box and fill in the blanks :1. At the age of 25, we have all permanent teeth. canines2. Tearing teeth are also known as canines. permanent3. Teeth located deep inside the jaw are called molars. four4. There are four premolars in each jaw. molars5. One should brush twice a day. twiceC. Write True or False against the following statements :1. Teeth are important for clarity in speech. True2. Cutting teeth are thin, flattened and sharp. True3. Tearing teeth are used for grinding food. False4. Decay teeth also affects general health of the body. True5. Eating too much sweets keep our teeth healthy. FalseFlowchartFill up the boxes to complete the flowcharts :(a)Functions of Teethto chew the food(b)to give a shape to our faceTypes of Teethto help us in speaking clearlyincisorscaninespremolarsmolarsLet us EnjoyEnjoy to draw the shapes of all four types of teeth in the space given here :(See space in text-book)Ans. Do yourself.Horizon Press61Science 'n' Us - 1 to 5
Page 1 and 2: Science'n'UsA COMPLETE SOLUTION OF
Page 3 and 4: 5. Three animals which give birth t
Page 5 and 6: C. Match the following :1. leaf (a)
Page 7 and 8: D. Match the following:1. crow (a)
Page 9 and 10: FlowchartFill up the boxes to compl
Page 11 and 12: 5. What type of claws and toes do c
Page 13 and 14: B. Choose the correct word from sid
Page 15 and 16: 8.STATES OF MATTERExerciseA. Answer
Page 17 and 18: 9.5. Topmost layer of earth's surfa
Page 19: 10.OUR WONDERFUL BODYExerciseA. Ans
Page 23 and 24: B. Choose the correct word from sid
Page 25 and 26: Ans.(ii) Surroundings of the house
Page 27 and 28: 3. Four rules of safety in the scho
Page 29 and 30: D. Write True or False against the
Page 31 and 32: FlowchartFill up the boxes to compl

Science 'N' us-3 final - School Books Publishers India

Create successful ePaper yourself

Delete template?

Save as template?