CBSE Class 7 Science Sample Paper Set 28

CBSE Class 7 Science Sample Paper Set B. 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 Name the type of nutrition found in non-green plants. 

2 Which country is credited with the discovery of silk? 

3 What is water table? 

4 Give one word for the following :

(a) Teeth with grinding surface.

(b) The long tube with a large number of finger like projections used for absorption of food.

5 Given below are some examples. Identify the type of change in each of them.

Example                    Change

E.g. Tearing of paper Physical

(i) Respiration in plants

(ii) Hammering of metals when hot.

(iii)Burning of cloth.

(iv)Evaporation of water.

6 Soham has a white shirt and a black shirt. Which shirt will make him more comfortable in

(a) winters (b) summers? Give reason for your answer.

7 (a)In the process of digestion in animals what happens to food in the (i) mouth (ii) stomach.

(b)What is the role of bile juice during digestion of food?

8 Rohit lives near sea shore. After sometime, he observed that the metal railings of his house got rusted.

a. Name the metal used to make railings.

b. Write the reaction which takes place between this metal and air.

c. Write any two ways in which the above process can be prevented.

9 (a)What is the use of kink in laboratory thermometer?

(b) Convert the following:

(i) 950 Fahrenheit to 0Celsius.

(ii)100 Celsius to 0 Fahrenheit.

10 An organism ‘X’ cannot manufacture food on its own .It lives on the body of ‘Y’, which provides ‘X’ with food as well as shelter.

(a) What is the general term used for ‘X’ and ‘Y’?

(b)Give one example of each ‘X’ and ‘Y’.

11 (a)Why do insectivorous plants trap insects?

(b)What is the role of chlorophyll in photosynthesis?

(c) What is symbiotic relationship? Give one example

12 The distance between two cities is 300 Km. A bus takes 5 hours to cover this distance.

Calculate the following:

(a) Speed of the bus.

(b)Speed at which bus should move in order to complete the above given distance in 4 hours?

13 Give reason:

(a)Cows and buffalos are able to digest cellulose.

(b)ORS is given to patients suffering from diarrhea.

(c) Digestion is essential for our body.

14 Draw and label the life cycle of a silk moth. 3

15 (a) Why clinical thermometer should be washed with an antiseptic solution before and after every use?

(b)Write any one advantage and one disadvantage of using mercury in a thermometer?

16 A metal ‘A ‘coiled in the form of a ribbon burns in air with a dazzling white light , to form a white colored ash ‘B’.

(a)Name ‘A’ and ‘B’.

(b) What type of change is occurring in the above case?

(c) Write word equation for the above reaction.

17 Write any three differences between aerobic and anaerobic respiration. 3

18 (a)Label the diagram of a thermos flask given below:

(b)How does a thermos flask help to maintain the temperature of the liquid kept inside it for longer duration of time?

19 (a) Name two traditional methods to store rainwater.

(b)Give two ways in which you can help minimize wastage of water at home.

(c) Explain two ways by which groundwater is recharged.

(d) Write any one advantage of drip irrigation system.

20 (a)Draw the diagram of human respiratory system and label the following.

(i) Trachea (ii) lungs.

(b) Why does an athlete breathe faster and deeper than usual after finishing the race?

(c) Raman politely warned his friend to quit smoking as it is injurious for health. Why is smoking injurious to health? Write any two values that you learn from Raman?

21 A jeep starts its journey from Pune at 07:00am. It reaches its destination at 09:00 am. The

distance covered by the car at various time intervals are as follows:

Distance        0            20           40           60         80

(Km)

Time (am) 07:00        07:30       08:00      08:30    09:00

(a)Draw the distance time graph for the given data.

(b)Mention the scale chosen by you for distance and time.

(c)From the graph find out the distance covered by the car at 07:15 am.

(d)Calculate the average speed of the car in Km/hr.

22 (a) Define- selective breeding.

(b)Give reasons:

(i) Cocoons are boiled in hot water.

(ii) Shearing does not hurt the sheep.

(iii)Sorters job is considered to be very risky.

(c) Give one difference between sorting and scouring process.

23 (a) Complete the following table:

(b) Write any two ill effects or consequences of discharging untreated factory waste directly into water bodies.

24 (a)When is “World Water Day” celebrated?

(b)How is construction of dams harmful to our environment?

(c)What is potable water?

(d)Give any two ways to utilize the waste water given out by RO system(water purifier) in your house?

25 Plants store food in the form of :

(a) Cellulose (b) Sugar (c) Glucose (d) Starch.

26 Which of the following is a synthetic fiber:

(a) Rayon (b) Silk (c) Cotton (d) Wool.

27 The mode of transfer of heat which does not require medium is

(a) Conduction (b) Convection (c) Radiation (d) Conduction and convection both.

28 Exchange of gases is done in the body of insects like cockroaches, ants and mosquitoes by the help of openings called:

(a) Nostrils (b) Spiracles (c) Gills (d) Lungs.

29 On dipping a wooden spoon, steel spoon and a plastic spoon in a glass containing hot water which spoon gets heated up first and why?

30 Give one method we use to get relief from cramps after exercise. 1

31 What is the position of the ribs in human body during inhalation and exhalation of air? 1

32 Name the instrument which shows the distance travelled by a vehicle. 1

33 Give names of any two time measuring devices used in the ancient times? 1

34 Observe the given structure of stomata.

(a)Label the parts A, B and C.

(b)What will happen when plants are devoid of stomata?

35 On the basis of the situation given below, answer the question that follows.

Situation : Rahul brushes his teeth only once in the morning. He is now complaining of tooth ache.

Which substance causes tooth decay and how?

36 In what way sneezing helps the normal process of respiration?

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