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Annual Exam Science (2013) class VII


SARPANG LOWER SECONDARY SCHOOL
ANNUAL EXAMINATION- 2013
Class:  VII Science                            Full Mark: 100                       Time: 2½ hours
Name: ……………………………………………… Sec:………..Roll No:…………
Read the following directions carefully
1.     Do not write for the first fifteen minutes. This time is to be spent reading questions. After having read the questions, you will be given two and half hours to answer all the questions.
2.     In this paper, there are sections: A and B. You will find 5 questions in section A and 5 questions in section B. You must answer all the questions.
3.     Read the directions to each questions carefully and write all your answers in the space provided in the question booklet itself.
4.     Do not remove or tear any pages from the booklet.
5.     Remember to write quickly but neatly.
Questions
Section A (50 marks)
Section B (50 marks)
Chief markers Initial
Q.1
(30)
Q.2
(5)
Q.3
(5)
Q.4
(5)
Q.5
(5)
Q.6
(5)
Q.7
(10)
Q.8
(10)
Q.9
(10)
Q.10
(10)
Total
100

Marks awarded













Marker’s initials





























SECTION-A
                                                          Answer ALL Questions                   
(50x1=50)
DIRECTION: Each question in this section is followed by four possible choices of answers. Choose the most correct answer and write it down in the space provided
1.     In which of the following substances, the particles are packed tightly?
                 a). Water.                    b). Stone            c).Milk                     d).Air                                 Ans: ……………………………………
2.     The change of state from solid to liquid is called
a). Evaporation.   b). Condensation     c).Melting                     d).Freezing             
Ans: …………………..…………………
3. All of the following are properties of a magnet except
a).A magnet can attract magnetic materials.                   b).A magnet has a directive property.
c).Like poles repel each other and unlike poles attract.  d).Poles of a magnet do not exist in pairs.
Ans: ……………………………………………
(Study the figure and answer the question number 4 and 5)
   Object
 10 N
 20 N
 
                                                                                                                   
4.     What is the resultant force of the object?
a).5 N                               b).10N                        c).20 N                              d).30 N 
Ans: …………………………………….
5.     In which direction will the object move?
a)     The object moves towards the 20 N force.
b)     The object moves towards the 10 N force.
c)     The object does not move.
d)     The object moves up and down.
Ans: …………………………………………………………………………….

6.     What energy conversion occurs in an archery player?
A.    Chemical energy      sound energy        potential energy       kinetic energy      Sound energy
B.    Chemical energy         potential energy       kinetic energy       sound energy.
C.    Chemical energy       kinetic energy      potential energy       kinetic energy       sound energy.
D.    Potential energy        kinetic energy      chemical energy       kinetic energy       sound energy.
Ans: ……………………………………………………………………………….

7.     Energy due to position is called____________energy.
a).Kinetic       b). Chemical            c).Electric           d).Potential                            
Ans: …………………………….
8.     Organism that eats only plants are called__________
a).Omnivores.                  b).Herbivores.                      c).Carnivores.            d).Producers.
Ans: …………………………….
9.     ______________is the process of coating iron sheets with a very thin layer of zinc.
a). Plating                    b).Galvanizing              c). Alloying                        d).Painting
Ans: …………………………………….
10.     When magnesium burns in air, magnesium oxide is formed. The most correct chemical equation for the reaction is
a). Mg + O2                         MgO2                                         b). Mg + O2                         Mg2O
c). Mg + O2                         Mg2O2                                        d). Mg + O2                          MgO  
Ans: …………………………………………………………………………………….
11.    Which of following cycle is a physical change?
a). Nitrogen cycle.          b). Carbon cycle.           c). Water cycle.         d).Life cycle
Ans: ………………………………………... 
         
12.   What is the symbol of sodium?
a).Na               b).So                    c).S                d).Sd                                                
Ans: ………………………………………
13.  The ____________ has less humus but is rich in minerals and it is hard and compact.
a). Top soil                        c). Sub soil                        d).Bed rock            e).Sandy soil
Ans: …………………………………..
14.    The presence of impurities in water
a).Raises the boiling point.                                                b).Lowers the boiling point.
c).Has no effect on the boiling point.                                 d).Raises the freezing point.    
Ans: …………………………………..
15.   One advantage of soft water is that it
a).Helps to produce sound teeth.                                       b).Easily produces lather with soap.
       c).Produces scum with soap.                                             d).Good for making beer.                
Ans: ……………………………………
16.   What does a green plant need during photosynthesis?
a).Oxygen and water.                          b).Oxygen and carbon dioxide.
     c). Carbon dioxide and glucose.          d).Carbon dioxide and water.                 
Ans: …………………………………..
17.    Since animals cannot prepare their own food, they are called
a).Autotrophs.         b).Photrophs.           c).Chemotrophs.           d).heterotrophs.        
Ans: …………………………………
18.   Organisms without back bones are called
a). Invertebrates.      B).Vertebrates.        c).Arthropods.            d).Flat worms.                              Ans: ………………………………

19.   The organisms which have chlorophyll are
a).Monera.                           b).Plants.                  d).Mollusks.               e).Fungi.                Ans: ………………………………
20.   Which of the following is not a physical change?
a). Dissolving sugar in water.  b).Magnetizing a nail.   C).burning sugar.    D).Breaking glass.               Ans: ………………………………
21.   Growing of leguminous plants with cereals is called
a).Crop rotation.                                    b).Mixed cropping.
       c).Artificial cropping.                           D).Leguminous cropping.                               
Ans: ………………………………….
22.    Yaks are not seen in Sarpang because
a).They are scared to live in border area.                      b).There is insufficient food.
c).There is plenty of food in cold places.                d).They are adapted to live only in cold places.
Ans: …………………………………………………………………………………………
23.   The scientific name of national animal takin is
a).Panthera tigris.   b).Sus sylvanicus.   C).Budrocas taxicolor.      d).Presbytis geei.         Ans: …………………………………
24.   All are measures taken by our government to reduce green house effect EXCEPT
A.     Celebrating social forestry day.
B.    People are encouraged to practice shifting cultivation.
C.    Maintain 60% of forests cover for all times to come.
D.    Banned on import of reconditioned vehicles.
Ans: …………………………………………………………………………………….
25.   Organisms that depend on producers are called
A.    Quaternary consumer                                b).Tertiary consumer
c).Secondary consumer                                  d).Primary consumer                         
Ans: ……………………………………..
26.   What is the unit of work?
a).Ampere                  b).Volts                               c).Newton                           d).Joules                  Ans: ……………………………………
27.   The polarity of a magnet can be tested by
a).Attraction of another magnet                                      b).Repulsion of another magnet
      c).Touching a magnetic material                                    d).Touching  a non- magnetic material          Ans: ……………………………………
28.  An object of mass 20 kg is taken to the roof of a building 30 m high. What is the potential energy of the object.[ if g = 10 m/s2]
a).10J                                             b).30 J                          c).60 J                     d).6000J       Ans: …………………………………….
29.   Name the gas used in burning.
a).Nitrogen          b).Carbondioxide            c).Hydrogen               d).Oxygen                                   Ans: …………………………………..
30.    What is the instrument used to measure atmospheric pressure?
a).Hygrometer        b).Voltmeter      c).Barometer         d).Newton meter                                       Ans: ………………………………….
Question 2
Fill in the blanks [5 marks]
1.     A substance made up of only one type of atoms is called_____________.
2.     The outermost protective layer found in plant cell is_______________.
3.     The mixture of two or more metals is called__________________.
4.     The force that opposes motion is ____________force.
5.     Parasite which live inside the body of a host are called------------------------




Question 3
State whether the following statements are TRUE or FALSE                      [5 marks]
1.     Diffusion is the movement of particles from the region of higher concentration to the region of lower concentration.                                                     (                  )
2.     The light rays which falls on a surface is called reflected rays.       (                  )
3.     Evaporation is the change of state from gas to liquid.                      (                 )
4.     Instrument use to measure the flow of current is called ammeter.   (                 )
5.     Denitrifying bacteria removes nitrogen from the soil.                     (                 )



Question 4
       Match the following                                                                                [5 marks]
Column A
Column B
1.     Acids
2.     Water
3.     Neon
4.     Soil
5.     Sun
a.      Mixture of rocks and humus.
b.     Inert gas
c.      Source of all energy
d.     Turn blue litmus red
e.      pH 7





Question 5                                                     
1.     Define the following terms                                                    [1x3]
a.      Matter


b.     Weathering


c.      Habitat.

2.     Write down the chemical reaction for the following.         [1x2]
a.      Burning of sulphur in oxygen.


b.     Burning of carbon in insufficient supply of oxygen.


                                                             






SECTION-B
Answer all Questions
(Long Answer Questions 5x 10= 50 Marks)
Question.6                                                                                                      [10]
a)     Write any two disadvantages of friction. [2]


b)     The three states of matter are solid, liquid and gas. In which state are the particles moving faster? Give reason to support your answer. (2)





c)     a) Balance the following chemical equations. (3)
                           i.          H2  +  Cl2------------------   HCl
                         ii.          Cu  +  O2 -------------------------------->   CuO
                       iii.          H2   +   O2--------------------->   H2O
d)     What is Brownian motion? (1)

e)     Give reason (2)
i.                 Liquid pours out of a tin easily when you make two holes instead of one.

ii.               A light bulb containing a tungsten filament is NOT filled with air.


Question 7
i.                 Draw a neat diagram to show how water moves through a cycle. (3)








ii.               Why is carbon extremely important to living organisms? (2)


iii.             Mention ANY TWO activities which cause Global warming (2)


iv.             What are fertilizers? Give TWO examples of nitrogenous fertilizers. (1+2)




Question 8
1.     State the uses of the following gases. (3)
                          a.          Nitrogen

                         b.          Carbon dioxide


                          c.          Argon

2.     What are the TWO conditions on which the solubility of the solute in water depends on?                                                                                              (2)




3.     What is an eclipse? Explain the formation of solar eclipse with diagram. (3)



4.     What is photosynthesis? Support your answer with equation. (2)



Question 9
a.                What is a food chain? Write out a food chain having five organisms.     (2)




b.               What are the factors on which kinetic energy depends? Write the equation to show the relation.                                                                                                     (2)




c.                Pema drags a box of weight 500N through a distance of 300m. Calculate the work done by Pema.                                                                                         (2)




d.               State the law of conservation of energy.                                                 (1)




e.                What are the uses of                                                                                 (3)
                           i.          Ammeter

                         ii.          Galvanometer

                       iii.          Voltmeter

Question 10                                                         
1.               Define catalyst. Give one example. (1.5)


2.               Decide whether each change given below is a physical or a chemical change. (1.5)
a)     Rusting of iron.

b)     Making a cheese from milk


c)     Heating a piece of iron to 1000o C and letting it cool again.

3.               Write down the products of burning of firewood. (1)



4.               Differentiate between inter-specific and intra- specific competition. (2)

Inter-Specific Competition
Intra-specific competition






5.               State TWO uses of magnets. (2)

6.               State the energy conversion in the following. (2)
a)     An electric fan

b)     Sound box



                                    ********HAPPY VACATION*********



Sarpang Lower Secondary School
Class VII Science,2013
Sl #
Topic/chapter
Rem
und
Application
Analysis
Evaluation
Creative
Total
1
Nature and its composition
A2.1,A5.1a
A3.1,A5.2a
A1, B6.c(3)
A2, B6b(2)
A5.2b, B6d

13
2
Air
A29,A30
A4.3

B6Ei&ii(2)
B8i(3)

8
3
The earth
A2.3, A5.1b
A13, A4.4




4
4
Water
A3.3

A15

B8.2(2)

4
5
Sunlight
A3.2
A16,A4.5
B8.3(3)

B8.4(2)

8
6
Living things
A17, A5.1c
A18,A2.2
A19



5
7
Physical & Chemical Change
A12
B10.3
B10.1(1.5)
A11, A20
A10
B10.2(1.5)
7
8
Water Cycle


A14
B7i(3)


4
9
Carbon cycle



B7ii&iii(4)
A24

5
10
Nitrogen Cycle


B7iv(3)
A3.5


4
11
Environmental chemistry
A9, A23
A4.i&ii(2)
A21
A22


6
12
Ecosystem

A8

B10.4(2)
A2.5
B9a(2)
6
13
Energy in our life
A7, A25

B9b(2)
A6
B9d
B10.6(2),B9c(2)
10
14
Force in action
A26
A2.4
A4, A28, B6A(2).

A5

7
15
Electricity and Magnetism
A3.4
B9.e(3)
A27, B10.5(2)
A3


8


17
17
24.5
20
14
7.5
100


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