question_answer1) Transpiration takes place through:
A) stomata done clear
B) chlorophyll done clear
C) midrib done clear
D) none of these done clear
View Answer play_arrowA) Respiration done clear
B) Reproduction done clear
C) Excretion done clear
D) Movement done clear
View Answer play_arrowquestion_answer3) Which of the following is/are not always necessary to observe a shadow?
A) Sun done clear
B) Screen done clear
C) Source of light done clear
D) Opaque object done clear
View Answer play_arrowquestion_answer4) In a magnet, the regions of maximum attraction are:
A) all over the body done clear
B) at the two ends of the magnet done clear
C) at any one end done clear
D) at the centre of the magnet done clear
View Answer play_arrowA) tiny drops of water floating in air done clear
B) mixture of dust and water vapour done clear
C) particles of water vapour done clear
D) rain drops in air done clear
View Answer play_arrowquestion_answer6) Given below are the names of some animals:
| (i) Cow |
| (ii) Sheep |
| (iii) Horse |
| (iv) Ox |
A) (i) and (iii) done clear
B) (i) and (ii) done clear
C) (ii) and (iii) done clear
D) (iii) and (iv) done clear
View Answer play_arrowquestion_answer7) Given below are the steps to test the presence of proteins in a food item:
| (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. |
A) (i), (ii), (iv), (iii) done clear
B) (ii), (i), (iv), (iii) done clear
C) (ii), (i), (iii), (iv) done clear
D) (iv), (ii), (i), (iii) done clear
View Answer play_arrowA) Cotton done clear
B) Wool done clear
C) Silk done clear
D) Jute done clear
View Answer play_arrow| (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 |
A) (i), (ii) and (iv) only done clear
B) (i), (ii) (iii). and. (iv) done clear
C) (ii) and (iii) only done clear
D) (ii), (iii) and (iv) only done clear
View Answer play_arrowquestion_answer10) Underwater divers wear fin-like flippers on their feet to
A) swim easily in water done clear
B) look like a fish done clear
C) walk on water surface done clear
D) walk over the bottom of the sea (sea bed). done clear
View Answer play_arrow| 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. |
question_answer17) What do the biotic and abiotic components include?
View Answer play_arrowquestion_answer18) Name two devices that are used to measure length.
View Answer play_arrowquestion_answer19) Suggest a situation where we obtain more than one shadow of an object at a time.
View Answer play_arrowquestion_answer21) Write the uses of magnets
View Answer play_arrowquestion_answer23) List four activities that are possible due to presence of air.
View Answer play_arrow| 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. |
question_answer29) State for each of the following whether it is due to evaporation or condensation.
| (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? |
question_answer33) How are synthetic fibers more advantageous and economical than natural fibers?
View Answer play_arrow| 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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