Nso-level2-class-7-set-5

7

SET

5

Level - 2

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SCIENCE 1.

Read the following statements and select the correct option. Statement 1: Objects which are not moving are at rest. Statement 2: Distance and displacement travelled by the body depends on path it follows.



A. B. C. D.

Both statements 1 and 2 are true. Both statements 1 and 2 are false. Statement 1 is true. Statement 2 is true.

2.

The motion of a car measured by an odometer is shown below:

S.No. Time Distance 1. 0 min 0 km 2. 1 min 1 km 3. 2 min 2 km 4. 3 min 3 km 5. 4 min 5 km What is the average speed till 3rd min of the journey? A. 60 km h–1 B. 90 km h–1 –1 C. 100 km h D. 60 m s–1 3.

A plastic ruler is held at the edge of a table with a part of the ruler sticking out. If extended part of the ruler is pulled down and released, what type of motion will it exhibit?

6.

Which of the following statements is/are true (T) or false(F)?



(i)

7.

Salma is facing a plane mirror while Avinash is running towards her from behind. If Avinash is running at a speed of 1 m s–1, how fast Avinash seems to be running towards salma?



A. 1 m s–1 C. 5 m s–1

Reflection of light is independent of the nature of reflecting surface. (ii) Air is an example of transparent medium. (iii) Luminous object acts as a source of light. (iv) A virtual image is formed by a convergent reflected beam of light. (i) (ii) (iii) (iv) A. T T   F T B. F T  T F C. T T  F F D. F T  F T

B. 2 m s–1 D. 9 m s–1

8.

How many letter(s) are not changed when the given word is seen through a mirror ? "NATIONAL" A. 5 B. 6 C. 7 D. 3 9.

Observe the diagram shown below.



What can you conclude from the diagrams? A. Object a is transparent but object b is opaque. B. Object a is magnetic but object b is not. C. Object a has a smooth surface but object b has a rough surface. D. Object a is a source of light but object b is not.

Fixed end

Pull



A. Rotatory motion C. Oscillatory motion

4.

Avinash came across a situation where he needs to convert 25°C into °F. He finds out 127°F when he converts 25°C into °F. What is the correct answer according to you?

A. 127°F C. 90°F

B. D.

Circular motion Rectilinear motion

Geeta found that a glass A was stuck inside another glass B. What could she do to separate the two glasses?



A.



2

10. Which of the following processes are involved in the experiment as shown in figure? Test tube

B. 77°F D. 99°F

5.





Pour hot water into glass A and put glass B in hot water. B. Pour hot water into glass A and put glass B in cold water. C. Pour cold water into glass A and put glass B in cold water. D. Pour cold water into glass A and put glass B in hot water.

Water Ice cubes



A. B. C. D.

Bunsen burner

Conduction and melting. Insulation and heating. Conduction and contraction. Expansion and contraction.

11. Hot air balloon is an application of



A. B. C. D.

Air exerts pressure Air is stronger than balloon Warm air rises up None of these. Class-7 | Level 2

12. If all the bulbs and cells in the circuits are identical then, which one of the following circuit has the maximum electric current flowing through it ?

A.

B.



D.   

C.

13. The range between lower fixed point and upper fixed point is divided into _________ parts on Celsius scale. A. 100 C. 273

B. 180 D. 50

14. Arrange the following statements in correct sequence.

(i) Fuse wire heats up. (ii) Fuse wire melts. (iii) Circuit is broken so current stops. (iv) Current becomes too high. A. (i) → (iii) → (iv) → (ii) B. (iv) → (i) → (ii) → (iii) C. (iv)→ (ii) → (i) → (iii) D. (i) → (ii) → (iii) → (iv)

18. Different quantities of baking soda and vinegar solution both having equal strength were mixed as shown in the figure.

What will be the colour of solution when few drops of China rose indicator is added to I, Methyl orange indicator to II and Red litmus solution to III.

A. B. C. D.

I-Dark pink, II-No change, III-Blue I-No change, II-Green, III-Pink I-Green, II-No change, III-No change I-Blue, II-Pink, III-No change

19. Aqueous solution of salt I turns blue litmus red, aqueous solution of salt II turns phenolphthalein to pink and aqueous solution of salt III has no effect on any indicator. Salts I, II and III could be respectively

A. Sodium chloride, magnesium sulphate and ammonium carbonate B. Ammonium sulphate, sodium carbonate and sodium sulphate C. Potassium carbonate, sodium nitrate and ammonium chloride D. None of these.

15. Who am I?





20. Read the given statements carefully and find out the correct statement.

I. I am bitter in taste. II. I am soapy to touch. III. I turn red litmus paper blue. IV. I help during indigestion. A. Lactic acid B. Magnesium hydroxide C. Common salt D. Sugar

16. Priya kept some iron nails in open humid environment. After some days she observed that the iron nails were coated with a brown powder known as X. Identify X and the type of change involved. A. X— B. X — C. X— D. X—

Rust, chemical change Iron, physical change Charcoal, physical change Carbon,chemical change



A.



B.



C.



D.

21. Read the given statements carefully and select the correct option. Statement 1 : Antacids are given in case of indigestion. Statement 2 : Antacids contain magnesium hydroxide or aluminium hydroxide.

17. Which of the following samples will not show any change in colour of china rose indicator?









A. Vinegar, common salt solution and sour milk B. Common salt solution, sugar solution and distilled water C. Lime water, detergent solution and curd D. None of these

Class-7 | Level 2

Curdling of milk is a physical change and heating of milk is also a physical change. Cutting of wood is a chemical change and burning of wood is also a chemical change. Mixing of iron and sulphur is a physical change whereas heating of iron and sulphur is a chemical change. Wax undergoes only a chemical change during the burning of a candle.



A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Statement 1 is false but statement 2 is true. 3

22. Which of the following is true regarding a chemical change?

I.



II. III. IV. A. B. C. D.

A lot of energy in the form of heat, light etc. is either absorbed or given out. A gas may be formed. A temporary change in colour may take place. Sound may be produced. I and II only II, III and IV only I, II and IV only I, II, III and IV

23. Which of the following statements are correct for the given plant? 1. The plant is non-green and does not carry out photosynthesis. 2. The pitcher-like structure is the modified part of the leaf. 3. It captures insects and digests them by the digestive juices secreted in the pitcher. 4. The plant shows saprotrophic mode of nutrition. A. 1 and 2 B. 2 and 3 C. 1 and 4 D. 2 and 4 24. The relationship in which two organisms live together and get benefits from each other is called symbiosis. Which among the following shows symbiotic relationship? A. Mycorrhiza B. Lichens C. Nepenthes D. Both A and B 25. Study the given table carefully and identify P, Q, R and S. Animal Food Snake Rat, eggs of animals, etc. Seeds and fruits Q Ant Insects, fruits, etc. Lice S P

A. B. C. D.

Q

Swallowing Rabbit Sucking Eagle Sucking Rabbit Swallowing Eagle

27. Study the given flow chart and select the correct statement regarding it.

A. M can be asbestos and P can be hemp. B. N can be cotton and M can be silk. C. O can be wool and P can be rayon. D. M can be polyester and P can be asbestos. 28. Which of the following animals yields a high quality wool woven into fine shawls called pashmina shawls.

A.

B.



Mode of feeding P C.

Gnawing R Sucking R

S

Scraping Blood Brewing Flesh Scraping Flesh Brewing Blood

26. Refer to the given figure of an alimentary canal of a ruminant and identify the parts labelled as P, Q, R and S. Select the incorrect statement regarding it. 4

A. P harbours a population of anaerobic bacteria which help in fermentation of food. B. Excess of water is absorbed in R. C. Q is also known as true stomach. D. In S, gastric juices act upon the food and its digestion is carried out.



D.

29. Read the given statements and select the correct option. Statement 1: Man-made fibres like polyester, nylon and acrylic are synthesised from petrochemicals. Statement 2: These fibres burn with a smell of burning paper or burning hair.

A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Class-7 | Level 2



C. D.

Statement 1 is true but statement 2 is false. Both statements 1 and 2 are false.

30. The figure shows an instrument which is used to measure_______.



A. B. C. D.

(i)-(a), (ii)-(b), (iii)-(d), (iv)-(c), (v)-(e) (i)-(c), (ii)-(f), (iii)-(a), (iv)-(b), (v)-(g) (i)-(f), (ii)-(a), (iii)-(b), (iv)-(g), (v)-(d) (i)-(a), (ii)-(e), (iii)-(c), (iv)-(b), (v)-(f)

35. Study the given figure of a biogas plant carefully. Which of the following statements are incorrect regarding it.

A. Earthquake  B. Rainfall C. Temperature D. Humidity 31. Which of the following statements are correct regarding the adaptations shown by a penguin?



1.

A thick layer of subcutaneous fat, which provide insulation against the cold. 2. Penguin possesses wide and large paws having long, curved and sharp claws which help it to walk on snow. 3. Penguin is a good swimmer, have streamlined body and paddle-like webbed feet. 4. Penguin has two thick layers of fur. A. 1 and 2 B. 2 and 3 C. 1 and 3 D. 1 and 4

32. X is an old world monkey endemic to the Western Ghats of South India. It is also known as 'beard ape' due to its characteristic silver-white mane. Identify X.

A. Lion-tailed macaque C. Tamarin monkey

B. D.

Orangutan Toucans

33. Study the given flow chart carefully.





1.

It is used to produce methane rich fuel gas known as biogas with the help of methanogenic bacteria. 2. Biogas consists of 95% methane, 1% carbon dioxide and traces of nitrogen, H2S and hydrogen. 3. The calorific value of biogas is 60-65 MJ/m3. 4. 50% of the combustible energy present in organic waste can be changed into methane gas using this plant. A. 1 and 2 B. 2 and 3 C. 3 and 4 D. 1 and 4

36. Study the given word grid carefully. Which of the following is not given in the grid. S E W A G E Z

Select the correct option for e, f, g and h. A. f - 25%, g - air B. e - organic matter, f - 55% C. g - organic matter, h - 45% D. e - air, f - 45% 34. Match column I with column II and select the correct options from the codes given below. Column I Column II (i) Kerala (a) Ahars (ii) Rajasthan (b) Kulhs (iii) Bihar (c) Surangams (iv) Himachal Pradesh (d) Ponds (v) Madhya Pradesh (e) Kattas (f) Khadins (g) Bhundhis Class-7 | Level 2



A. B. C. D.

L M N S X Y M

U R E E A O N

D D W W S T P

G S A E T E G

E X C R E T A

A pipe carrying sewage A chemical used to disinfect water. Solid waste extracted in sewage treatment. Waste matter discharged from human body.

37. Which of the following statements are correct?

(i)

In insects, circulating body fluids serve to distribute oxygen to tissues. (ii) Yeasts respire anaerobically, and are used to make wine and beer. (iii) O2 concentration is less in alveolar air than in expired air. (iv) Normal breathing rate for an adult human being at rest is 16-18 times/minute. 5



(v) Total capacity of human lungs in a healthy person is 1500 mL. (vi) Sneezing expels out the inhaled foreign particles that irritate nasal cavity. A. (i), (ii) and (iii) B. (ii), (iv) and (vi) C. (ii), (iii), (iv) and (vi) D. (i), (ii), (iv) and (vi)

38. Raj set up an experiment as shown in the given figure. He added bicarbonate indicator to each test tube, which change the colour of solution into red colour.

41. Which of the following statements are correct about the heart?

Snail

Tube A

Tube C

He then kept the experiment undisturbed in sunlight for one hour. What will be his observation?

A. B. C. D.

The solution in the test tube A will turn yellow. The solution in the test tube B will turn purple. There will be no change in colour in test tube C. All of these

39. Match column I and column II (Scrambled letters) and select the correct option from the codes given below. Column I Column II (i) The air tubes in insects (a) MTSOAAT (ii) Large flat muscle, present (b) HRTCAEA at the floor of chest cavity (iii) Tiny pores on the surface (c) SONRTLIS of leaves (iv) Small openings through (d) HIDPRAMGA which we inhale A. (i)-(b), (ii)-(d), (iii)-(a), (iv)-(c) B. (i)-(a), (ii)-(c), (iii)-(b), (iv)-(d) C. (i)-(b), (ii)-(a), (iii)-(c), (iv)-(d) D. (i)-(d), (ii)-(b), (iii)-(a), (iv)-(c) 40. Which of the following incorrectly differentiates between breathing and respiration. Breathing Respiration A. It is a physical process. It is a chemical process. B. It involves breathing It occurs at cellular organs, e.g., lungs. level. C. Exchange of gases Series of chemical takes place. reactions takes place. D. Energy is released. Energy is consumed. 6

Which of the following identifies the blood vessels (P, Q, and R) correctly?

Snail Tube B

The heart acts like a pump, transporting nutrients to all parts of the body. 2. The beating of heart is beyond our control. 3. An adult's heart is about the same size as the clenched fist. A. 1 and 2 only B. 2 and 3 only C. 1 and 3 only D. 1, 2 and 3

42. Study the given figures carefully.

Water plant Water plant

1.

A. B. C. D.

P Capillary Artery Capillary Artery

Q Vein Capillary Artery Vein

R Artery Vein Vein Capillary

43. Read the given paragraph. Human beings need to (i) various materials to different parts of their body. This is the function of the (ii) system. This system consists of a liquid called (iii) , a pump called the (iv) , and a series of (v) . Select the correct option which fills the blanks.

A.



B.



C.



D.

(i) transport, (ii) circulatory, (iii) blood, (iv) heart, (v) blood vessels (i) transport, (ii) circulatory, (iii) blood, (iv) kidney, (v) ureters (i) synthesise, (ii) digestive, (iii) blood, (iv) heart, (v) arteries (i) excrete, (ii) excretory, (iii) urine, (iv) kidney, (v) ureters

44. Which of the following is/are not an advantage of vegetative propagation?

1. 2.

Seedless plants can be obtained. The plants lose their vigour because of no genetic variation. 3. Plants produced by this method take less time to grow. 4. Many plants are produced which results in overcrowding and lack of nutrients. A. 1 and 2 B. 2 and 3 C. 2 and 4 D. 3 and 4 45.

Which of the following is not a correct match? A. Stem cutting - Bryoplyllum B. Layering - Rhododendron C. Grafting - Mango D. Budding - Yeast Class-7 | Level 2

ACHIEVERS SECTION 46. The person shown in figure is getting an electric shock. Which one of the following is accurately describes what happened?



A. The human body can conduct electricity. B. The electricity in the wire had no where to go. C. Electricity is circulating round and round in the body. D. Electricity in the wire flowed out from the nearest object.



A. B. C. D.

(i)-(b), (ii)-(d), (iii)-(a), (iv)-(c) (i)-(a), (ii)-(c), (iii)-(b), (iv)-(d) (i)-(c), (ii)-(a), (iii)-(d), (iv)-(b) (i)-(d), (ii)-(b), (iii)-(c), (iv)-(a)

49. The given paragraph has some words italicised in it. Select the correct option regarding them. Sometimes, during vigorous muscular activity such as long distance running, our body cannot get enough oxygen to produce the required energy. To get the additional energy anaerobic respiration occurs within the muscle cells. In this process, there is partial breakdown of starch to produce lactic acid, the accumulation of which in the body causes bone cramps. A. Anaerobic should be replaced by aerobic. B. Starch should be replaced by glucose. C. Bone cramps should not be replaced at all. D. Lactic acid should be replaced by proteins. 50. Rohit set up an experiment in a room as shown below.

47. Study the given Venn diagram.

Centre point represents II. Lemon juice IV. Lime water

Column I Column II (i) Mulberry silk (a) Antheraea paphia (ii) Eri silk (b) Bombyx mori (iii) Tassar silk (c) Antheraea assamensis (iv) Muga silk (d) Philosamia ricini

A.



C.

B. A B Time (day)

B A Time (day)

D.

Height of water level (cm)

48. Match column I with column II and select the correct option from the codes given below.

He poured 500 ml of water into beakers A and B and then placed a small plant in beaker A. He then recorded the height of the water level in both A and B every day for a week. His results were presented in the form of a graph. Which graph correctly shows the changes in water level in both A and B?

Height of water level (cm)

Amla juice Salt solution I and II only II only IV only I, II, III and IV.

Height of water level (cm)

I. III. A. B. C. D.

Height of water level (cm)



B A Time (day)

B A Time (day)

SPACE FOR ROUGH WORK

Class-7 | Level 2

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