(i) Cow |
(ii) Sheep |
(iii) Horse |
(iv) Ox |
(i) Take a small quantity of the food item in a test tube, add 10 drops of water to it and shake it. |
(ii) Make a paste or powder of food to be tested. |
(iii) Add 10 drops of caustic soda solution to the test tube and shake well. |
(iv) Add 2 drops of copper sulphate solution to it. |
(i) Burning degrades the soil |
(ii) Burning produces harmful gases/fumes |
(iii) Precious raw materials to obtain manure at low cost are lost. |
(iv) Lot of heat is. generated unnecessarily |
Answer the following questions in one word or in a sentence only. |
(i) Name the joint where our neck joins the head. |
Answer the following questions in one word or in a sentence only. |
(ii) Name two plants found on mountains ? |
Answer the following questions in one word or in a sentence only. |
(iii) What is meant by distance? |
Answer the following questions in one word or in a sentence only. |
(iv) What are translucent materials? |
Answer the following questions in one word or in a sentence only. |
(v) Define solar cell. |
Answer the following questions in one word or in a sentence only. |
(vi) Some materials are given as cloth, plastic, aluminum, wood, glass, iron. Collect the non-magnetic materials. |
Write the type of joint which is used for each of the following movements: |
(a) A cricket bowler bowls the ball. |
(b) A girl moves her head in right and left direction. |
(c) A person lifts weights to build up his biceps. |
(i) What is a habitat? |
(ii) How is Cactus adapted to survive in a desert? |
Four children measure the length of a table which was about 2 m. Each of them used different ways to measure it. |
(i) Sam measured it with a half meter long thread. |
(ii) Gurmeet measured it with a 15 cm scale from her geometry box. |
(iii) Reena measured it using her handspan. |
(iv) Salim measured it using a 5 m long measuring tape. |
Which one of them would get the most accurate length? Give reason for you answer. |
(i) Paheli connected two bulbs to a cell as shown in Fig. |
She found that filament of bulb B is broken. Will the bulb A glow in this circuit? Give reason. |
(ii) What is a fused bulb? |
Fill in the blanks in the following sentences: |
(i) Artificial magnets are made in different shapes such as ........, ?? and............... . |
(ii) The materials which are attracted towards a magnet are called................. . |
(iii) Paper is not a ...................... material. |
(a) Water drops appear on the outer surface of a glass containing cold water. |
(b) Steam rising from wet clothes while they are ironed. |
(c) Fog appearing on a cold winter morning. |
(i) Which gas in the atmosphere is essential for respiration? |
(ii) Why does a lump of cotton wool shrink in water? |
Answer the following questions: |
(a) Make a table showing different kinds of packaging materials. Write the purpose of each when used. |
(b) Give an example in which packaging should have been reduced. |
(c) Write a story on how packaging increases the amount of garbage. |
(a) What are carbohydrates? Give an example. |
(b) In which forms are carbohydrates found in our food? |
Explain the following observations very briefly. |
(a) A firki does not rotate in a closed area. |
(b) The arrow of weather cock points towards a particular direction at a particular moment. |
(c) An empty glass in fact is not empty. |
(d) Breathing through mouth may harm you. |
Boojho kept a magnet close to an ordinary iron bar. He observed that the iron bar attracts a pin as shown in Fig. |
What inference could be drawn from this observations? Explain. |
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