CBSE Class 7 Science Sample Paper Set 02

CBSE Class 7 Science Sample Paper Set 2.Sample Papers are the very important for every student. The sample papers should be practiced to gain extra marks in examinations. The sample papers have been prepared based on summative assessment1 and summative assessment 2 pattern. The sample papers have been prepared based on pattern of last year examinations and as per latest changes in the syllabus. Students, teachers and parents can download all CBSE educational material and very well prepared worksheets from this website.  All CBSE educational material is developed by our panel of teachers, have also been submitted by CBSE teachers and students. 

Section A

Q.1. What is the SI unit of time? 1

Q.2. What is the source of litmus solution? 1

Q.3. Where is extra bile stored in our body? 1

Q.4. Explain why rusting of iron objects is faster in coastal areas than in deserts? 2

Q.5. Define the following terms- 2

a) Oscillatory motion b) periodic motion

Q.6. What happens when hydrochloric acid is added to sodium hydroxide solution? What is the name of this reaction? 2

Q.7. Why are the walls of small intestine thrown into finger like projections ?What are these structures known as? 2

Q.8. Identify the type of motion in the following cases- 3

a) Motion of the strings of the sitar

b) Soldiers doing march past

c) Change of seasons

d) Motion of a ceiling fan

e) Motion of sewing needle

f) Rising of the sun

Q.9. Identify the secretions of the following glands and write their functions? 3

a) Salivary gland b) pancreas c) liver

Q.10. Take some lemon juice in a test tube and put a drop of red litmus solution .Repeat your activity by adding blue litmus . What will be the change in the colour of the solution in both the cases ?What do you conclude about the nature of the lemon juice? 3

Q.11. A school bus takes 20 minutes to cover a distance of 15 Km. Calculate the speed in km\hr. 3

Q.12. Draw a well labeled diagram of Human digestive system? (4 labels) 3

Q.13. Classify the following changes as physical and chemical changes- 3

a) Rottening of food b) Cutting of vegetables c) Burning of magnesium

d) Photosynthesis e) ) Rusting of iron f) Powdering a piece of chalk.

Q.14. A simple pendulum takes 20 seconds to complete 25 oscillations? What is the time period of the pendulum? 3

Q.15. Which type of teeth is involved in- 3

a) Biting an apple b) Tearing the flesh c) Chewing and grinding of chapatti

Q.16. Name the bases found in- 3

a) Lime water b) soap c) milk of magnesia

Q.17. a) What is the food for amoeba? (1+2)

b) How does amoeba capture the food and digest it?

Q.18. a) What color change is produced when an iron nail is dropped in copper sulphate solution?

b) What is the new substance formed in this reaction.

c) Identify the type of change. 3

Q.19. State one function each of Hydrochloric acid ,large intestine and mucus in our body. 3

Q.20. A Person travelling in a bus noted the timings and corresponding distances as indicated on the kilometer stones.

SNO.   TIME(seconds)   DISTANCE(meter)

1             0                      0

2            2                      5

3            4                     10

4             6                     15

A) Using the above data plot distance-time graph on graph paper. (2)

B) What do you conclude about the motion of the bus from the above graph? (1)

C) From the graph paper find out the distance covered by the bus at the end of 3 seconds and 5 seconds? (2)

Q.21. Correct the following statements- 5

a) Hydrochloric acid is applied on the skin when an ant bites.

b) Grazing animals quickly swallow their food and stored in oesophagus.

c) Fats are broken down into amino acids on digestion.

d) When carbon dioxide is passed through lime water it turns milky due to the formation of calcium hydroxide.

e) Melting of ice is a chemical change.

Q.22. Differentiate between-(1point each) 5

a) Assimilation and absorption

b) Speedometer and odometer

c) Ingestion and egestion

d) Uniform motion and non uniform motion

e) Physical change and chemical change

Q23. A) Using phenolphthalein as an indicator identify the nature of vinegar, window cleaner and sodium hydroxide?

B) Identify the color change on addition of china rose juice in the following substances-

a)curd b)washing soda (3+2)

Q.24. Give reasons- 5

a) Antacids relieve us from indigestion.

b) Humans cannot digest cellulose.

c) Turmeric stain on white shirt is turned into red when it is washed with soap.

d) Factory wastes should be neutralized before disposing it into the water bodies.

e) Tamarind is sour in taste.

Section B

MCQ(Multiple Choice Questions) Maximum Marks-18

Each carries one mark.

Q.25. Tube which joins the eyepiece and objective is known as-

a) Stage    b) bottom tube    c) base tube    d)body tube

Q.26. Mixing of sodium bicarbonate with hydrochloric acid is a

a) Chemical change    b)random change    c)physical change    d)control change

Q.27. When carbondioxide is passed through lime water it turns

a) Transparent    b) milky    c)yellow     d)red

Q.28. Least count is the

a)minimum value of a device    b)intermediate value     c)maximum value    d) a&c

Q.29. Two consecutive reading of an apparatus are A&B (B>A) & n be the number of divisions between A &B. The formula of least count is-

a) A-B/n     b) B-A/n     c)n/B-A     D) n/A-B

Q.30. Formation of a new substance is the characteristic feature of-

a) Repeated change   b)rapid change    c)physical change    d)chemical change

Q.31. What is the colour change observed when magnesium is burnt in air-

a) Yellow powder   b)red powder    c)white powder    d)no change

Q.32. Lens near to the stage of the microscope is called-

a) Tube lens   b)condenser    c)objective    d) eyepiece

Q.33. If we dissolve the crystals of potassium permanganate in water and heat it ,the colored water start moving up because of-

a) Radiation    b)conduction    c) convection    d)none of the above

Q.34. ------------ is left behind when salt solution is heated in a china dish till it evaporates-

a) Precipitate  b) salt    c)both a and b    d)none of these.

Q.35. What color change is produced when red litmus solution is added in test tube containing magnesium hydroxide-

a) Magenta    b)red    c)blue    d)yellow 

Q.36. Chemical composition of lime water is-

a) Calcium carbonate   b) calcium hydroxide    c)calcium oxide    d)calcium bicarbonate

Q.37. What is the magnification of eyepiece of a microscope-

a) 40X   b)10X    c)100X   d)400X

Q.38. Percentage of carbon dioxide in air is-

a) 0.02    b)0.04    c)0.03    d)0.05

Q.39. What is the product formed when magnesium oxide is added in a test tube containing water-

a) Magnesium carbonate   b Magnesium dioxide    c) Magnesium hydroxide   d) Magnesium sulphide

Q.40. ------------ is the process in which heat is transferred from hot to cold body without the actual movement of molecules-

a)conduction    b)reflection     c)convection     d)absorption

Q.41. Carbon dioxide is produced during the process of –

a)digestion     b)circulation    c) breathing    d)assimilation

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