DELHI PUBLIC SCHOOL, JODHPUR Summative Assessment 1 ( ) Subject Science Class VII Time: 2½ hours M.M. 80

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DELHI PUBLIC SCHOOL, JODHPUR Summative Assessment 1 (2011-12) Subject Science Class VII Time: 2½ hours M.M. 80 General Instructions : 1.

1 DELHI PUBLIC SCHOOL, JODHPUR Summative Assessment 1 ( ) Subject Science Class VII Time: 2½ hours M.M. 80 General Instructions : 1. Please check that this question paper contains 05 printed pages and 20 questions. 2. All the questions are compulsory. 3. Attempt all the parts of a question together. SECTION A 1. Choose the correct options from the given choices and write the answer in your answer sheet. i. What kind of a mirror is this? a) plane mirror b) convex mirror c) concave mirror d) magnifying mirror ii. The structure shown here is called a greenhouse. Greenhouses have glass panels that let in light but keep heat from escaping. In which regions would greenhouse of this type be used to grow plants? a) Regions that are very cold b) Regions that are very hot. c) Regions that are very humid d) Regions that are very dry iii. Shown below is a picture of clinical thermometer. What is the temperature in Fahrenheit as shown by the thermometer reading? a) F b) F c) F d) F iv. Salman has grouped some changes as shown here. Reversible Change Irreversible Change Water evaporating in a closed container Leaves falling off a plant Breaking a wooden stick An oil lamp burning Heating a steel rod by a few degrees A fingernail getting broken ( 1 )

Which of them has been grouped INCORRECTLY? a) An oil lamp burning b) Leaves falling off a plant c) Breaking a wooden stick d) Heating a steel rod by a few degrees v.

2 Which of them has been grouped INCORRECTLY? a) An oil lamp burning b) Leaves falling off a plant c) Breaking a wooden stick d) Heating a steel rod by a few degrees v. A solution X in water turns blue litmus paper red. A solution Y in water turns red litmus paper blue. If the solutions X and Yare mixed in the right proportion, the resulting solution causes neither red nor blue litmus paper to change colour. Answer questions 1 and 2 based on this information. 1. Which of the following can be X and Y? [ 2 ] Option Solution X Solution Y A Water Vinegar B Baking soda Lemon juice C Orange juice Washing soda D Milk of magnesia Soap powder 2. The mixing of X and Y solution is an example of a a) Chemical change b) Physical change c) Reversible change d) It is not a change. vi. The table below gives details of weather conditions of a particular day of the previous week, in three cities in India. Study it and answer the question. Which of these can be found out from the information given in the table? City Forecast Sunrise sunset Maximum temperature Minimum temperature P 7:07 am 6:36 am Q 6:44 am 6:15 am R 6:33 am 6:13 am a) The season prevailing in the country. b) The temperature at the time of sunrise that day c) The temperature at the time of sunset that day d) The difference between the maximum and minimum temperature that day. 2. Circle the odd one out and write the reason why it is the odd one i) Neem, Cuscuta, Peepal, Babool. ii) Yak, Llama, Alpaca, Camel, Cow iii) Pitcher plant, Tulsi, Venus fly trap, bladderwort iv) Tassar, Mooga, Pashmina, Kosa, Eri ( 2 )

3 3. Complete the following reaction-: i) Copper sulphate + Iron ----> + ii) Carbon dioxide + Lime water -----> + iii) Hydrochloric acid + Sodium Hydroxide -----> + iv) Vinegar +Baking soda ----> + 4. Mark T if the statement is true and F if it is false, also correct the false statement. [ 10 ] i) Plants which can synthesise their food themselves are called saprotrophs. ii) Amoeba ingests its food with the help of its mouth. iii) Silk fibres are made of fat. iv) The normal temperature of human body is 48 0 C. v) Nitric acid turns red litmus blue. vi) In chemical changes new substances are produced. vii) Migration is another means to escapes the harsh, cold conditions. viii) Air expands on cooling and contracts on heating. ix) A real image cannot be obtained on screen. x) The tongue helps in mixing food with saliva. 5. Give one word for the following. i) The gas which turns lime water milky.. ii) The green pigment in plant.. iii) A saprotrophs organism. iv) The breakdown of complex components of food into simpler substance is called. v) The rearing of silkworms for obtaining silk is called vi) A reliable measure of the hotness of an object is its. vii) Substances which are neither acidic nor basic are called. viii) All the changes in the weather are driven by the. ix) An image which cannot be obtained on a screen is called. x) Some substances can be obtained in pure state from their solutions by. SECTION B 6. Name the type of carbohydrates that can be digested by ruminants but not by humans. Draw a neat and labeled diagram of amoeba. 7. You must be familiar with the following nursery rhymes : (i) Baa baa black sheep, have you any wool. (ii) Mary had a little lamb, whose fleece was white as snow. Answer the following : (a) Which parts of the black sheep have wool? (b) What is meant by the white fleece of the lamb? (c) Name the breeds of sheep that are found in Rajasthan. 8. Draw a graph showing the variation of maximum temperature during 01 September 2011 to 07 September Date Maximum temperature C C C C C C C ( 3 )

9. a) Identify the different steps involved in the processing of wool. b) Name the disease caused in the workers in wool industry. 10.

b) Give examples of three modes of transfer of heat. 12. a) Write the four changes which may accompany a new product during chemical change?

a) Explain why holes are made in hanging banners and hoardings. b) Name the factors that contribute to the formation of cyclones.

) a) The handle of a saucepan is made up of plastic b) A blanket keeps us warm in winter, but prevents ice from melting. 16.

4 9. a) Identify the different steps involved in the processing of wool. b) Name the disease caused in the workers in wool industry. 10. Write two differences between real and virtual image. Give example of each. 11. a) Name the mode of transfer of heat shown in the given diagram? b) Give examples of three modes of transfer of heat. 12. a) Write the four changes which may accompany a new product during chemical change? [ 3 ] b) Define the term galvanization. 13. How are penguins adapted to their climatic conditions? Write any three adaptations. [ 3 ] 14. a) Explain why holes are made in hanging banners and hoardings. b) Name the factors that contribute to the formation of cyclones. c) Identify the given image. 15. Give reasons (Why?) a) The handle of a saucepan is made up of plastic b) A blanket keeps us warm in winter, but prevents ice from melting. 16. i) Why does turmeric stain on the white shirt turned to red when wash with soap? ii) China rose give colour with acid & base. What colour changes does it gives in these solutions? iii) Name the acid found in the following: a) Vinegar b) Ant s sting c) Citrus fruits d) Curd. [ 3 ] ( 4 )

17. Explain the digestion taking place in mouth stomach, small intestine and large

a) Pitcher plant is an autotroph as well as heterotroph?

c) Write the importance of Rhizobium bacteria. 20.

5 17. Explain the digestion taking place in mouth stomach, small intestine and large intestine. 18. Look at the diagram carefully and explain the given activity. 19. a) Pitcher plant is an autotroph as well as heterotroph? Explain b) Look at the diagram carefully and explain mode of nutrition of a given organism. c) Write the importance of Rhizobium bacteria. 20. a) Write any five precautions which you will take if you are staying in a cyclone hit area. b) Write an activity to show that warm air is lighter than cold air ( 5 )

SUBJECT SCIENCE CLASS VII CHAPTER 4, HEAT

SUBJECT SCIENCE CLASS VII CHAPTER 4, HEAT 1. What is temperature? Temperature is the reliable measure of the hotness of an object. 2. What is thermometer? Thermometer is a device which is used to measure