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Page 1 of 7 
 
 
 
 
 
 
 
SA 1 –Science Sample Paper 
Grade 10         
Time: 3 Hours         Max. Marks: 90 
 
                 General Instructions 
1. The question paper comprises of two sections, A and B. You have to attempt both the 
sections. 
2. All questions are compulsory. 
3. All questions of Section A and all questions Of Section B are to be attempted separately. 
4. Question numbers I to 3 in Section A are one mark questions. These are to be answered 
in one word or one sentence. 
5. Question numbers 4 to 6 in Section A are two marks questions, to be answered in about 
30 words. 
6. Question numbers 7 to 18 in Section A are three marks questions, to be answered in 
about 50 Words. 
7. Question numbers 19 to 24 in Section A are five marks questions, to be answered in 
about 70 words. 
8. Question numbers 25 to 36 in Section B arc based on practical skills. Question 25 to 33 
carry one mark each and Question numbers 34 to 36 carry two marks 
 
SECTION 'A' 
1. State the effect on the strength of magnetic field produced at a point near a straight 
conductor if the electric current flowing through it increases. 
 
2. List any two advantages of using wind energy. 
 
    3.  Name the physical quantities that are indicated by the directions of thumb and 
forefinger in the Fleming's right hand rule. 
 
     4. Mention the provision of two different current ratings in our domestic circuits. Explain 
with reason the advantage of such a provision. 
 
    5. When hydrogen gas is passed over heated copper (Il) oxide.  Copper and steam are 
formed. Write the balanced chemical equation for this reaction and state 
        (i) The substance oxidized and (ii) The substance reduced in the reaction 
 
    6. Write balanced chemical equations for the following reaction: 
(i)Silver bromide on exposure to sunlight decomposes into silver and bromine. 
(ii) Sodium metal reacts with water to form sodium hydroxide and hydrogen gas. 
 
 
Page 2


Page 1 of 7 
 
 
 
 
 
 
 
SA 1 –Science Sample Paper 
Grade 10         
Time: 3 Hours         Max. Marks: 90 
 
                 General Instructions 
1. The question paper comprises of two sections, A and B. You have to attempt both the 
sections. 
2. All questions are compulsory. 
3. All questions of Section A and all questions Of Section B are to be attempted separately. 
4. Question numbers I to 3 in Section A are one mark questions. These are to be answered 
in one word or one sentence. 
5. Question numbers 4 to 6 in Section A are two marks questions, to be answered in about 
30 words. 
6. Question numbers 7 to 18 in Section A are three marks questions, to be answered in 
about 50 Words. 
7. Question numbers 19 to 24 in Section A are five marks questions, to be answered in 
about 70 words. 
8. Question numbers 25 to 36 in Section B arc based on practical skills. Question 25 to 33 
carry one mark each and Question numbers 34 to 36 carry two marks 
 
SECTION 'A' 
1. State the effect on the strength of magnetic field produced at a point near a straight 
conductor if the electric current flowing through it increases. 
 
2. List any two advantages of using wind energy. 
 
    3.  Name the physical quantities that are indicated by the directions of thumb and 
forefinger in the Fleming's right hand rule. 
 
     4. Mention the provision of two different current ratings in our domestic circuits. Explain 
with reason the advantage of such a provision. 
 
    5. When hydrogen gas is passed over heated copper (Il) oxide.  Copper and steam are 
formed. Write the balanced chemical equation for this reaction and state 
        (i) The substance oxidized and (ii) The substance reduced in the reaction 
 
    6. Write balanced chemical equations for the following reaction: 
(i)Silver bromide on exposure to sunlight decomposes into silver and bromine. 
(ii) Sodium metal reacts with water to form sodium hydroxide and hydrogen gas. 
 
 
Page 2 of 7 
 
 
 
 
 
7. (a) Give the formulae of the stable compound that is formed by the combination of Na 
and Cl using electron dot structure. (Atomic no. Na 11, Cl 17). 
(b) Name the cation and anion present in the ionic compound formed, 
 
8. What is meant by a double displacement reaction ? Explain by giving an example. Also 
give a balanced chemical equation for the reaction stating the states of the reactions and 
the products formed. 
 9. Write balanced chemical equation for the reactions that take place during respiration. 
Identify the type of combination reaction that takes place during this process and justify 
the name. Give one more example of this type of reaction. 
 
 10. Name the salts that are used in black and white photography. Give reactions when they 
are exposed to light. Define the type of chemical reaction taking place. 
 
11. Write the steps for balancing the chemical equation for the formation of ammonia by the 
combination of nitrogen and hydrogen. 
 
        12. Three resistors of 3 each are connected to a battery Of 3 V as shown. Calculate the 
current drawn from the battery. 
         
 
 
 
 
 
         13. Explain whether an alpha particle Will experience any force in a magnetic field if:  
 
(i) It is placed in the field at rest.  
 
(ii) It moves in the magnetic field parallel to field lines.  
 
(iii) It moves in the magnetic field perpendicular to field lines.  
 
14.  Define resistance. Write the Sl unit of resistance. Match the correct range of 
resistivity with the materials given: 
 
 
(a) Conductors  
 
(b)  Alloys  
 
(c)  Insulators  
 
15. Write three main functions of the nervous system. 
 
16. The rate of breathing in aquatic organisms is much faster than that in terrestrial 
organisms. Give reason. 
 
           
Page 3


Page 1 of 7 
 
 
 
 
 
 
 
SA 1 –Science Sample Paper 
Grade 10         
Time: 3 Hours         Max. Marks: 90 
 
                 General Instructions 
1. The question paper comprises of two sections, A and B. You have to attempt both the 
sections. 
2. All questions are compulsory. 
3. All questions of Section A and all questions Of Section B are to be attempted separately. 
4. Question numbers I to 3 in Section A are one mark questions. These are to be answered 
in one word or one sentence. 
5. Question numbers 4 to 6 in Section A are two marks questions, to be answered in about 
30 words. 
6. Question numbers 7 to 18 in Section A are three marks questions, to be answered in 
about 50 Words. 
7. Question numbers 19 to 24 in Section A are five marks questions, to be answered in 
about 70 words. 
8. Question numbers 25 to 36 in Section B arc based on practical skills. Question 25 to 33 
carry one mark each and Question numbers 34 to 36 carry two marks 
 
SECTION 'A' 
1. State the effect on the strength of magnetic field produced at a point near a straight 
conductor if the electric current flowing through it increases. 
 
2. List any two advantages of using wind energy. 
 
    3.  Name the physical quantities that are indicated by the directions of thumb and 
forefinger in the Fleming's right hand rule. 
 
     4. Mention the provision of two different current ratings in our domestic circuits. Explain 
with reason the advantage of such a provision. 
 
    5. When hydrogen gas is passed over heated copper (Il) oxide.  Copper and steam are 
formed. Write the balanced chemical equation for this reaction and state 
        (i) The substance oxidized and (ii) The substance reduced in the reaction 
 
    6. Write balanced chemical equations for the following reaction: 
(i)Silver bromide on exposure to sunlight decomposes into silver and bromine. 
(ii) Sodium metal reacts with water to form sodium hydroxide and hydrogen gas. 
 
 
Page 2 of 7 
 
 
 
 
 
7. (a) Give the formulae of the stable compound that is formed by the combination of Na 
and Cl using electron dot structure. (Atomic no. Na 11, Cl 17). 
(b) Name the cation and anion present in the ionic compound formed, 
 
8. What is meant by a double displacement reaction ? Explain by giving an example. Also 
give a balanced chemical equation for the reaction stating the states of the reactions and 
the products formed. 
 9. Write balanced chemical equation for the reactions that take place during respiration. 
Identify the type of combination reaction that takes place during this process and justify 
the name. Give one more example of this type of reaction. 
 
 10. Name the salts that are used in black and white photography. Give reactions when they 
are exposed to light. Define the type of chemical reaction taking place. 
 
11. Write the steps for balancing the chemical equation for the formation of ammonia by the 
combination of nitrogen and hydrogen. 
 
        12. Three resistors of 3 each are connected to a battery Of 3 V as shown. Calculate the 
current drawn from the battery. 
         
 
 
 
 
 
         13. Explain whether an alpha particle Will experience any force in a magnetic field if:  
 
(i) It is placed in the field at rest.  
 
(ii) It moves in the magnetic field parallel to field lines.  
 
(iii) It moves in the magnetic field perpendicular to field lines.  
 
14.  Define resistance. Write the Sl unit of resistance. Match the correct range of 
resistivity with the materials given: 
 
 
(a) Conductors  
 
(b)  Alloys  
 
(c)  Insulators  
 
15. Write three main functions of the nervous system. 
 
16. The rate of breathing in aquatic organisms is much faster than that in terrestrial 
organisms. Give reason. 
 
           
Page 3 of 7 
 
 
 
 
17. List in tabular form two distinguishing features between renewable and non-renewable 
sources of energy Give two examples of each. 
 
          18.  What is geothermal energy? How can it be used commercially?  List in tabular form, 
three distinguishing  features between a thermal power plant and a geothermal power 
plant. 
 
          19. Explain the following: 
 
(a) Why is tungsten used exclusively for filament 
of electric lamps?  
 
(b)  Why are the conductors of electric heating devices, such as bread toasters and 
electric iron made of an alloy rather than a pure metal? 
 
(c) Why is series arrangements not used domestic circuit?  
 
(d) How does the resistance of a wire vary with its area of cross section?  
(e)  How many joules are there in one kilo watt hour?  
 
20. A coil of insulated copper Wire is connected to a galvanometer.  
        
      (i) What happens if a bar magnet  
 
(a) Pushed into the coil?  
 
(b) Withdrawn from inside the coil?  
 
(c) Held stationary inside the coil   
 
Give reasons for your observation. 
 
    (ii) Mention one more method of inducing current in a coil. 
 
21. Give suitable reasons for the following statements:  
                  (a) Rain water conducts electricity but distilled water does not. 
                  (b) We feel burning sensation when we overeat. 
           (c) A tarnished copper vessel regains its shine when rubbed with lemon. 
           (d) The crystals of washing soda change to white powder on exposure to air. 
            (e) An aqueous solution of sodium chloride is neutral but an aqueous solution of  
                sodium carbonate is basic. 
 
22. (a) Explain the term rancidity. Name the type of chemical reaction responsible for  
           causing rancidity and define it. 
      (b) Write three methods of preventing rancidity. 
 
23. Explain in detail the process of nutrition in Amoeba. Also, draw a diagram. 
 
24. (a) Name the enzyme present in saliva. 
 (b) What is emulsification? 
 (c) Name the substance that is oxidised in the body during respiration. 
 (d) Why are lungs divided into very small sac-like structures? 
 
Page 4


Page 1 of 7 
 
 
 
 
 
 
 
SA 1 –Science Sample Paper 
Grade 10         
Time: 3 Hours         Max. Marks: 90 
 
                 General Instructions 
1. The question paper comprises of two sections, A and B. You have to attempt both the 
sections. 
2. All questions are compulsory. 
3. All questions of Section A and all questions Of Section B are to be attempted separately. 
4. Question numbers I to 3 in Section A are one mark questions. These are to be answered 
in one word or one sentence. 
5. Question numbers 4 to 6 in Section A are two marks questions, to be answered in about 
30 words. 
6. Question numbers 7 to 18 in Section A are three marks questions, to be answered in 
about 50 Words. 
7. Question numbers 19 to 24 in Section A are five marks questions, to be answered in 
about 70 words. 
8. Question numbers 25 to 36 in Section B arc based on practical skills. Question 25 to 33 
carry one mark each and Question numbers 34 to 36 carry two marks 
 
SECTION 'A' 
1. State the effect on the strength of magnetic field produced at a point near a straight 
conductor if the electric current flowing through it increases. 
 
2. List any two advantages of using wind energy. 
 
    3.  Name the physical quantities that are indicated by the directions of thumb and 
forefinger in the Fleming's right hand rule. 
 
     4. Mention the provision of two different current ratings in our domestic circuits. Explain 
with reason the advantage of such a provision. 
 
    5. When hydrogen gas is passed over heated copper (Il) oxide.  Copper and steam are 
formed. Write the balanced chemical equation for this reaction and state 
        (i) The substance oxidized and (ii) The substance reduced in the reaction 
 
    6. Write balanced chemical equations for the following reaction: 
(i)Silver bromide on exposure to sunlight decomposes into silver and bromine. 
(ii) Sodium metal reacts with water to form sodium hydroxide and hydrogen gas. 
 
 
Page 2 of 7 
 
 
 
 
 
7. (a) Give the formulae of the stable compound that is formed by the combination of Na 
and Cl using electron dot structure. (Atomic no. Na 11, Cl 17). 
(b) Name the cation and anion present in the ionic compound formed, 
 
8. What is meant by a double displacement reaction ? Explain by giving an example. Also 
give a balanced chemical equation for the reaction stating the states of the reactions and 
the products formed. 
 9. Write balanced chemical equation for the reactions that take place during respiration. 
Identify the type of combination reaction that takes place during this process and justify 
the name. Give one more example of this type of reaction. 
 
 10. Name the salts that are used in black and white photography. Give reactions when they 
are exposed to light. Define the type of chemical reaction taking place. 
 
11. Write the steps for balancing the chemical equation for the formation of ammonia by the 
combination of nitrogen and hydrogen. 
 
        12. Three resistors of 3 each are connected to a battery Of 3 V as shown. Calculate the 
current drawn from the battery. 
         
 
 
 
 
 
         13. Explain whether an alpha particle Will experience any force in a magnetic field if:  
 
(i) It is placed in the field at rest.  
 
(ii) It moves in the magnetic field parallel to field lines.  
 
(iii) It moves in the magnetic field perpendicular to field lines.  
 
14.  Define resistance. Write the Sl unit of resistance. Match the correct range of 
resistivity with the materials given: 
 
 
(a) Conductors  
 
(b)  Alloys  
 
(c)  Insulators  
 
15. Write three main functions of the nervous system. 
 
16. The rate of breathing in aquatic organisms is much faster than that in terrestrial 
organisms. Give reason. 
 
           
Page 3 of 7 
 
 
 
 
17. List in tabular form two distinguishing features between renewable and non-renewable 
sources of energy Give two examples of each. 
 
          18.  What is geothermal energy? How can it be used commercially?  List in tabular form, 
three distinguishing  features between a thermal power plant and a geothermal power 
plant. 
 
          19. Explain the following: 
 
(a) Why is tungsten used exclusively for filament 
of electric lamps?  
 
(b)  Why are the conductors of electric heating devices, such as bread toasters and 
electric iron made of an alloy rather than a pure metal? 
 
(c) Why is series arrangements not used domestic circuit?  
 
(d) How does the resistance of a wire vary with its area of cross section?  
(e)  How many joules are there in one kilo watt hour?  
 
20. A coil of insulated copper Wire is connected to a galvanometer.  
        
      (i) What happens if a bar magnet  
 
(a) Pushed into the coil?  
 
(b) Withdrawn from inside the coil?  
 
(c) Held stationary inside the coil   
 
Give reasons for your observation. 
 
    (ii) Mention one more method of inducing current in a coil. 
 
21. Give suitable reasons for the following statements:  
                  (a) Rain water conducts electricity but distilled water does not. 
                  (b) We feel burning sensation when we overeat. 
           (c) A tarnished copper vessel regains its shine when rubbed with lemon. 
           (d) The crystals of washing soda change to white powder on exposure to air. 
            (e) An aqueous solution of sodium chloride is neutral but an aqueous solution of  
                sodium carbonate is basic. 
 
22. (a) Explain the term rancidity. Name the type of chemical reaction responsible for  
           causing rancidity and define it. 
      (b) Write three methods of preventing rancidity. 
 
23. Explain in detail the process of nutrition in Amoeba. Also, draw a diagram. 
 
24. (a) Name the enzyme present in saliva. 
 (b) What is emulsification? 
 (c) Name the substance that is oxidised in the body during respiration. 
 (d) Why are lungs divided into very small sac-like structures? 
 
Page 4 of 7 
 
 
 
 
 
 
SECTION 'B'  
 
25.  Rina, after making quick lime to react with water, put strips of red and blue litmus 
papers in it. 
 
She observed that : 
 
(A) red litmus paper turned blue (B) red litmus paper remained red 
 
(C) blue litmus paper remained blue (D) blue litmus paper turned red 
 
26. Moushmee was asked to compare the reactivity of metals Zn and Fe. She took zinc 
granules and ferrous sulphate crystals in a 5O ml beaker. She waited for 10 minutes but no 
reaction took place.  
 
The reason was:  
 
(A) The beaker was small  
 
(B) She should have used a clean and dry test-tube  
 
(C) The ferrous sulphate was not an aqueous solution  
 
(D) The zinc granules were big in size 
 
27. A student arranged an electric circuit as shown below :  
 
 
 
 
 
 
 
 
 
He will observe : 
 
(A) no reading in either ammeter or the voltmeter.  
 
(B) no reading in voltmeter. but a finite reading in the ammeter.  
 
(C) no reading in the ammeter, but a finite reading in the voltmeter  
 
(D) a finite reading in the ammeter and the voltmeter 
 
28. The resistors that are connected in series in the following circuit are: 
 
 
 
 
 
 
 
 
 
(A) B, A and D (B) B, C and D      (C) C, D and A         (D) A, B and C 
 
 
     29. Following circuit diagrams are drawn by four students to determine the equivalent  
          resistance of two resistors connected in parallel: 
 
Page 5


Page 1 of 7 
 
 
 
 
 
 
 
SA 1 –Science Sample Paper 
Grade 10         
Time: 3 Hours         Max. Marks: 90 
 
                 General Instructions 
1. The question paper comprises of two sections, A and B. You have to attempt both the 
sections. 
2. All questions are compulsory. 
3. All questions of Section A and all questions Of Section B are to be attempted separately. 
4. Question numbers I to 3 in Section A are one mark questions. These are to be answered 
in one word or one sentence. 
5. Question numbers 4 to 6 in Section A are two marks questions, to be answered in about 
30 words. 
6. Question numbers 7 to 18 in Section A are three marks questions, to be answered in 
about 50 Words. 
7. Question numbers 19 to 24 in Section A are five marks questions, to be answered in 
about 70 words. 
8. Question numbers 25 to 36 in Section B arc based on practical skills. Question 25 to 33 
carry one mark each and Question numbers 34 to 36 carry two marks 
 
SECTION 'A' 
1. State the effect on the strength of magnetic field produced at a point near a straight 
conductor if the electric current flowing through it increases. 
 
2. List any two advantages of using wind energy. 
 
    3.  Name the physical quantities that are indicated by the directions of thumb and 
forefinger in the Fleming's right hand rule. 
 
     4. Mention the provision of two different current ratings in our domestic circuits. Explain 
with reason the advantage of such a provision. 
 
    5. When hydrogen gas is passed over heated copper (Il) oxide.  Copper and steam are 
formed. Write the balanced chemical equation for this reaction and state 
        (i) The substance oxidized and (ii) The substance reduced in the reaction 
 
    6. Write balanced chemical equations for the following reaction: 
(i)Silver bromide on exposure to sunlight decomposes into silver and bromine. 
(ii) Sodium metal reacts with water to form sodium hydroxide and hydrogen gas. 
 
 
Page 2 of 7 
 
 
 
 
 
7. (a) Give the formulae of the stable compound that is formed by the combination of Na 
and Cl using electron dot structure. (Atomic no. Na 11, Cl 17). 
(b) Name the cation and anion present in the ionic compound formed, 
 
8. What is meant by a double displacement reaction ? Explain by giving an example. Also 
give a balanced chemical equation for the reaction stating the states of the reactions and 
the products formed. 
 9. Write balanced chemical equation for the reactions that take place during respiration. 
Identify the type of combination reaction that takes place during this process and justify 
the name. Give one more example of this type of reaction. 
 
 10. Name the salts that are used in black and white photography. Give reactions when they 
are exposed to light. Define the type of chemical reaction taking place. 
 
11. Write the steps for balancing the chemical equation for the formation of ammonia by the 
combination of nitrogen and hydrogen. 
 
        12. Three resistors of 3 each are connected to a battery Of 3 V as shown. Calculate the 
current drawn from the battery. 
         
 
 
 
 
 
         13. Explain whether an alpha particle Will experience any force in a magnetic field if:  
 
(i) It is placed in the field at rest.  
 
(ii) It moves in the magnetic field parallel to field lines.  
 
(iii) It moves in the magnetic field perpendicular to field lines.  
 
14.  Define resistance. Write the Sl unit of resistance. Match the correct range of 
resistivity with the materials given: 
 
 
(a) Conductors  
 
(b)  Alloys  
 
(c)  Insulators  
 
15. Write three main functions of the nervous system. 
 
16. The rate of breathing in aquatic organisms is much faster than that in terrestrial 
organisms. Give reason. 
 
           
Page 3 of 7 
 
 
 
 
17. List in tabular form two distinguishing features between renewable and non-renewable 
sources of energy Give two examples of each. 
 
          18.  What is geothermal energy? How can it be used commercially?  List in tabular form, 
three distinguishing  features between a thermal power plant and a geothermal power 
plant. 
 
          19. Explain the following: 
 
(a) Why is tungsten used exclusively for filament 
of electric lamps?  
 
(b)  Why are the conductors of electric heating devices, such as bread toasters and 
electric iron made of an alloy rather than a pure metal? 
 
(c) Why is series arrangements not used domestic circuit?  
 
(d) How does the resistance of a wire vary with its area of cross section?  
(e)  How many joules are there in one kilo watt hour?  
 
20. A coil of insulated copper Wire is connected to a galvanometer.  
        
      (i) What happens if a bar magnet  
 
(a) Pushed into the coil?  
 
(b) Withdrawn from inside the coil?  
 
(c) Held stationary inside the coil   
 
Give reasons for your observation. 
 
    (ii) Mention one more method of inducing current in a coil. 
 
21. Give suitable reasons for the following statements:  
                  (a) Rain water conducts electricity but distilled water does not. 
                  (b) We feel burning sensation when we overeat. 
           (c) A tarnished copper vessel regains its shine when rubbed with lemon. 
           (d) The crystals of washing soda change to white powder on exposure to air. 
            (e) An aqueous solution of sodium chloride is neutral but an aqueous solution of  
                sodium carbonate is basic. 
 
22. (a) Explain the term rancidity. Name the type of chemical reaction responsible for  
           causing rancidity and define it. 
      (b) Write three methods of preventing rancidity. 
 
23. Explain in detail the process of nutrition in Amoeba. Also, draw a diagram. 
 
24. (a) Name the enzyme present in saliva. 
 (b) What is emulsification? 
 (c) Name the substance that is oxidised in the body during respiration. 
 (d) Why are lungs divided into very small sac-like structures? 
 
Page 4 of 7 
 
 
 
 
 
 
SECTION 'B'  
 
25.  Rina, after making quick lime to react with water, put strips of red and blue litmus 
papers in it. 
 
She observed that : 
 
(A) red litmus paper turned blue (B) red litmus paper remained red 
 
(C) blue litmus paper remained blue (D) blue litmus paper turned red 
 
26. Moushmee was asked to compare the reactivity of metals Zn and Fe. She took zinc 
granules and ferrous sulphate crystals in a 5O ml beaker. She waited for 10 minutes but no 
reaction took place.  
 
The reason was:  
 
(A) The beaker was small  
 
(B) She should have used a clean and dry test-tube  
 
(C) The ferrous sulphate was not an aqueous solution  
 
(D) The zinc granules were big in size 
 
27. A student arranged an electric circuit as shown below :  
 
 
 
 
 
 
 
 
 
He will observe : 
 
(A) no reading in either ammeter or the voltmeter.  
 
(B) no reading in voltmeter. but a finite reading in the ammeter.  
 
(C) no reading in the ammeter, but a finite reading in the voltmeter  
 
(D) a finite reading in the ammeter and the voltmeter 
 
28. The resistors that are connected in series in the following circuit are: 
 
 
 
 
 
 
 
 
 
(A) B, A and D (B) B, C and D      (C) C, D and A         (D) A, B and C 
 
 
     29. Following circuit diagrams are drawn by four students to determine the equivalent  
          resistance of two resistors connected in parallel: 
 
Page 5 of 7 
 
     Which is the correct one?   (a) I     (b) II     (c) IV       (d) III 
 
 
 
 
 
 
 
 
 
 
 
 
30. A cell, a resistor, an ammeter and a key are arranged in the circuit diagram as shown below. 
The current recorded in the ammeter will be: 
           
 
 
 
              
 
 
 
 
(A) maximum in circuit A (B) maximum in circuit B        (C) maximum in circuit C       (D)  Same 
 
in all cases 
 
31. Photosynthesis is a light dependent : 
 
(A) Autotrophic nutrition   (B) Saprophytic nutrition 
 
(C) Parasitic nutrition                             (D) Heterotrophic nutrition 
 
32. Chloroplasts are :  
 
(A) present in epidermal cells and absent in guard cells  
 
(B) present in guard cells and absent in epidermal cells  
 
(C) present in both guard cells and epidermal cells  
 
(D) absent in both guard cells and epidermal cells  
 
33.  A well-stained leaf peel preparation when focussed under high power microscope would 
show: 
 
 
(A) epidermal cell. stomata, guard cell, each With one nucleus each and many chloroplast.  
 
(B) epidermal cell, stomata, guard cell, each With many nuclei and one chloroplast.  
 
(C) stomata and guard cells without chloroplast and one nucleus each.  
 
(D) Stomata, but no guard cells or epidermal cells.  
 
34. Four students connect four cells of 1.5 V each to get a battery of voltage 6 V. Which of the 
following circuit is incorrect? Give reason. 
 
 
 
 
 
 
            
 
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FAQs on Science_Sample paper - Class 10

1. What are the main branches of science?
Ans. The main branches of science include physics, chemistry, biology, earth science, and astronomy. Each branch focuses on different aspects of the natural world and uses scientific methods to study and understand them.
2. How does the scientific method work?
Ans. The scientific method is a systematic approach used by scientists to investigate and understand phenomena. It involves making observations, formulating a hypothesis, designing and conducting experiments, analyzing data, and drawing conclusions. This method ensures that scientific research is objective, reliable, and repeatable.
3. What is the importance of scientific knowledge in our daily lives?
Ans. Scientific knowledge helps us understand the world around us, make informed decisions, and solve problems. It contributes to advancements in technology, medicine, and various industries. Scientific knowledge also promotes critical thinking, curiosity, and a deeper appreciation for the natural world.
4. How are scientific theories different from scientific laws?
Ans. Scientific theories and laws are both based on extensive evidence and scientific experiments. However, they serve different purposes. A scientific theory is a well-substantiated explanation of a natural phenomenon, supported by a large body of evidence. It explains why and how something happens. In contrast, a scientific law is a concise statement or mathematical formula that describes a fundamental principle or relationship observed repeatedly in nature.
5. What are some ethical considerations in scientific research?
Ans. Ethical considerations in scientific research involve ensuring the welfare and rights of human and animal subjects, avoiding conflicts of interest, maintaining confidentiality, and conducting research with integrity. Researchers must obtain informed consent from participants, minimize harm, and adhere to ethical guidelines set by institutions and governing bodies. Ethical considerations are crucial to protect the well-being of individuals involved and maintain the trust and credibility of scientific research.
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