CBSE Class 7 Science Sample Paper Set 29

CBSE Class 7 Science Sample Paper Set C. It’s always recommended to practice as many CBSE sample papers as possible before the examinations. The latest sample papers have been designed as per the latest blue prints, syllabus and examination trends. Sample papers should be practiced in examination condition at home or school and also show it to your teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.

1.Farmers generally like the soil to be a mixture of sand, silt, clay and humus. Why? What is such a soil called?

2 What is fragmentation? Give one example of an organism which reproduces by fragmentation.

3 What is the difference in the size of the image (of the same object) formed by a small and a large plane mirror?

4 What is an antacid? Give one example.

5 Where are valves found in human body? Write their function.

6 a) When does overloading occur?

b) Write any two factors on which amount of heat produced in a current carrying wire depends?

7 a) Why is pulmonary vein an exception to veins?

b) Explain any two functions of sweat in human body.

c) What kind of patients is put on dialysis? How does it help them?

8 You have been provided with three unlabeled bottles -one contains sulphuric acid, another contains calcium hydroxide base, and the third one is a salt solution. How will you identify them using the china rose solution?

9 100ml of water was added drop wise to 50 g of dry soil kept on filter paper in a funnel. The amount of water collected in the graduated cylinder below was found to be 50ml. Calculate the percentage of water absorbed by the soil.

10 a) Explain the process of fertilization in flowers with the help of a well labeled diagram.

b) Name two organisms that can reproduce by spore formation.

11 a) Explain how water and minerals are transported in plants.

b) Define translocation.

c) Write any two differences between RBCs and WBCs.

12 In soil A, 150ml of water takes 10 ml to percolate completely whereas in soil B, 110 ml of water takes 10 minutes to percolate completely. Calculate the percolation rate in both cases. In which of the two samples, percolation rate is higher.

13 a) A student made the following diagram to explain the circulation of blood in human body. Identify the mistakes and redraw the correct diagram.

b) Explain the working of human heart.

14 a) What are unisexual and bisexual flowers? Give one example of each.

b) Explain budding in yeast with the help of a diagram.

15 a)Justify the following statements:

i) Concave mirrors are used in torches.

ii) Convex mirror is used as a vigilance mirror in shops.

b) Draw a ray diagram showing the principal focus of a convex mirror.

16 Label the parts A, B and C in the given diagram of an electric bell and explain their working.

17 a)Define the following:

i)Dispersion of light

ii)Spectrum of white light

b) Name the mirror which can form:

i) an inverted image smaller than the object.

ii) an erect image smaller than the object.

18 Name the following:

a) A violent storm with thunder and lightning.

b) A place in India that is prone to cyclones.

c) An instrument used for finding the direction of wind.

d) Cyclone as called in Japan and Phillipines.

e) Layer of air surrounding the earth.

f) Seasonal winds that bring rains and blow from sea to land during summer.

19 a)Classify the following into acidic, basic and neutral solution:

lemon juice, juice produced in stomach , ammonia solution, juice of unripe mangoes, milk of magnesia, common salt solution.

b) Give reasons for the following:

i) Factory waste is treated before discharging into water bodies.

ii) Calamine solution relieves when applied on an insect bite.

20 a) What is soil erosion? Name any one agent responsible for it.

b) Draw a well labeled diagram of a soil profile. Write one characteristic of each horizon.

21 a) Rani is observing her image in a plane mirror. The distance between the mirror and her image is 6m. If she moves 1m towards the mirror. Find the distance between her and her image?

b) State two characteristics of image formed by a plane mirror.

22 a) Study the following diagrams carefully and give reason for the effect shown in each case:

b)Name the following winds in the given diagram:

c) Write any two safety measures that should be taken by the people living in cyclone prone coastal areas.

23 a) On what principle does the electric bulb work? Briefly explain its working

b) What is the full form of ISI? Why should we look for ISI mark before buying electrical appliances?

24 a) Differentiate between asexual and sexual reproduction in plants?

b) Write two benefits of seed dispersal.

c) Name the plant part by which the following are grown:

i) Bryophyllum ii) potato

25 If you get a turmeric stain on your clothes while eating food, and tried to wash it off with soap, the stain becomes red. Why?

26 Raju observed that bubbles were coming out of the soil on adding water to it. What is the reason for such an observation?

27 Gappu is a milkman. During summer, milk gets sour while he goes to distribute it. To avoid this, he started adding some baking soda to the milk. Why?

28 What kind of flowers do you expect to be attractive-insect pollinated flowers or wind pollinated flowers. Why?

32 The mouth of a balloon is stretched and fixed tightly over the neck of an empty boiling tube.

When this boiling tube is placed in a beaker containing hot water, the balloon fixed over the neck of boiling tube gets inflated. Why?

33 What is the similarity between a prism and a water droplet?

34 What effect does construction of buildings and roads have on water percolation through the soil? Hence what effect would this have on the water table?

35 In the diagram given below, the bulb is not glowing. Give reason and redraw the correct diagram.

36 Mohit used a fuse wire with a specification of 6 ampere in a circuit connected to an air conditioner which draws a current of 10 ampere. What will happen when the air conditioner is switched on? What will you advice him to do?

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