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Year 10 ENTRY EXAMS FOR YEAR 9. SCIENCE CHECKPOINT EXAM

SECTION A CHEMISTRY

  1. The atomic structure of an element is shown below.
Image result for atomic structure of carbon
  1. Write down the name and the symbol of the element.

i.Name…………………………………………………………………………….

ii.Symbol………………………………………………………………………….

  • Write down the electron arrangement of the element…………………………………………
  • Which Group and Period does the element belong?

i.Group……………………………………………………………………………..

                         ii.Period……………………………………………………………………………..

  • I am an element in found in group five and period three. Which element am I?

……………………………………………………………………………………………………..

  • Define the following terms.
  1. Atom ………………………………………………………………………………………………………………………………………………………
  • Element …………………………………………………………………………
  • Write down the elements with the following symbols    
  • P

………………………………………………………………………

  • Ca …………………………………………………………………………
  • Write down the electron arrangement of each element.
  1. Aluminum……………………………………………………………..
  • Argon…………………………………………………………………..
  • An atom is the smallest particle of an element which cannot be split further by any chemical means. Write down the three kinds of particles that make up an atom

           i.    ………………………………………………………………………………………

            ii.  ………………………………………………………………………………………

            iii. …………………………………………………………………………………… [3]

  • The symbol K shown represent Potassium element

Write down                                                              

         a. its mass number?      ……………………………………..  [1]                                            

           b. its atomic number? ……………………………………… [1]

  • Draw a diagram to show the electron distribution in the shells of a chlorine atom. Use dots or crosses (3)
  • Complete the following reactions  equations          [8]
  1. Sodium carbonate  + sulfuric acid
  • Potassium  +  hydrochloric acid
  • Calcium hydroxide  +  nitric acid
  • Lithium  + water
  • Apart from temperature, write down other three factors that affect the rate of a chemical reaction.                                       

i. ………………………………………………………………………………………………………………..

ii.   ………………………………………………………………………………………………………………..

iii.  ……………………………………………………………………………………………………………[3]

  1. Using the particle theory, briefly explain how change in temperature affect the rate of a chemical reaction

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………[2]

  1. An experiment was done in two different temperatures to see how the change in temperature affects the rate of a reaction.

                    Experiment A was done in a temperature of 300c

                    Experiment B was done in a temperature of 500c

The graph below shows the results for the two reactions.

On the graph label A and B to indicate the two reactions                                            [2]

Vol of

gas

produced

                        Time (sec)

  1. Complete the following displacement reactions where possible. If impossible, write ”No reaction”[5]
  •     
  •  

SECTION B  BIOLOGY

  1. Define the following terms:                                                                                                       4marks.
  2. Photosynthesis.

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  • Ecology.

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  • Food web.

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  • Decomposers

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  • Explain why photosynthesis only takes place inside chloroplasts.                                  1marks.

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  • a ) Give 2 examples of mineral salts that are needed by plants.                                     2marks

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

b) Explain why a plant that does not have enough magnesium will not grow well.              2marks

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

        4.        Explain 4 roles of water to plant    8marks

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

5. Explain why plants need help to get their male gametes to their female gametes. 1marks.

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

        6.        a) Explain what is meant by seed dispersal. 1 mark.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

       7.  Explain 3 factors affecting the size of animal population.      6marks.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

       8.         State and explain the effects of  adding fertilizers to water sources.   5 marks.                                    

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

SECTION C PHYSICS


1.   State the Principle of Moments ?  1mark
………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………


2. For a see-saw to balance, the moments on each side must be the same.

   For each of these, write “balanced” or “unbalanced” :

          (i)                                                                                   (ii)

       => ___________________________________         => _______________________________

          (iii)                                                                                  (iv)

  

    => _______________________________ 
               =>_______________________________

  3.  The  see-saws  shown below is balanced. Work out the missing number for each one.
          (i)

     

 2 marks

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………


5.   A seesaw is 4.0m long with the pivot at its midpoint. A boy who weighs 400N sits at   

      a distance of 1.5m from the pivot. His sister weights 300N
    (a) Draw a diagram to show the beam, the Pivot and the forces and their distance from

          the pivot.                                                                                                                             [2]

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………



     (b) Calculate the distance at which the girl must sit if the beam is to be balanced.        [2]

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

6.  (a) What is meant by the term ‘density’?[2]
………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

  (c)  A fish tank measures 80 cm x 20 cm x 25 cm. It is to be filled with water , density 1.0 g/cm3. Calculate the mass of water in the tank when it is full .                                              [3]


……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………


7       A student measures the volume of a cork.

He puts some water into a measuring cylinder and then one glass ball. He puts the cork and then a second, identical glass ball into the water as shown.

cm3 cm3 cm3  
100 100 100  
80 80 80 glass ball
     
60 60 60  
40 40 40 cork
     
20 20 20  
  glass ball   glass ball
    diagram 1     diagram 2   diagram 3  

            Diagram 1 shows the first water level.

     Diagram 2 shows the water level after one glass ball is added.

           Diagram 3 shows the water level after the cork and the second glass ball are added.
          
What is the volume of the cork?                                                                                    [3]
………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………


8.  The fig below shows Jung Yae Ji standing on soft sand. She does not sink into the soft sand.  
     She has a mass of 50 kg.

        (a)  Calculate the force of her body acting on the sand.

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

                                                                                            Force = ………………….  [ 2]
                                                                                                  

  • The total area of both her shoes in contact with the sand is 0.02 m2.

Calculate the pressure the she exerts on the sand, when standing as shown in the figure                                                                                                                   [3]

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… 

                                                                                              Pressure = …………………………….. N / m2
                                                                                                                                                             

           (c)   Fig. 8.2 shows a block of wood.

5.0 CM

5.0 CM

10.0 CM

Fig. 8.2 (not to scale)

                 
                The block of wood shown in Fig. 8.2 has a mass of 200 Kg. 
             Calculate the MAXIMUM Pressure it can exert on its surface                        

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………  [3]         

9 . (a) Use the words from here (torch, battery, connecting wire, variable resistor, switch and bulb)
          to label the diagram below.

A is ___________________                    B is ___________________



C is ___________________                    D is ___________________

                                                                                                                                                      [4]

(b) Is the globe working and lit up?   Explain your answer.
    

                                                                                                                                         1 mark

Categories
Computer

Maranda Computer studies past papers

Name…………………………………………………………………  Index No…………………………

School…………………………………………………………………Candidate’s signature………….

                                                                                                                Date………………………………..

451/2

COMPUTER STUDIES

Paper 2

(PRACTICAL)

July / August 2012

Time 2 ½ HOURS

MARANDA POST MOCK- 2012

Kenya Certificate of Secondary Education (K.C.S.E)

451/2

COMPUTER STUDIES

Paper 2

(PRACTICAL)

July / August 2012

Time 2 ½ HOURS

INSTRUCTIONS TO CANDIDATES

1.         Type your name, school and index number at the top right hand corner of each printout

2.         Sign and write date of examination in the spaces provided above

3.         Write your name and index number on the removable storage medium

4.         Passwords should not be used while saving on the removable storage

5.         Answer ALL questions

6.         All questions carry equal marks

7.         ALL answers MUST be saved in the removable storage

8.         Make a printout of the answer sheets provided

9.         Hand in all the printout at the removable storage.

This paper consists of 8 printed pages.

Candidates should check the question paper to ensure that all

pages are printed as indicated and no questions are missing

1.         The following data is an extract of data obtained from Chai company records. Study the data and answer the questions that follow.

Area Producer id Name Quantity delivered (kg) Gross pay Transport cost Deduction Net pay
101B 115 John Kamau 4562        
79A 145 Mathew B 1254        
79A 012 Kanuga Symon 235        
79A 561 Ann Wangige 8954        
101B 016 Joseph Kaitano 9658        
20Z 123 Namachanja Esther 7895        
20Z 458 Kerobo Betty 456        
101B 654 Flo Ngina 421        
20Z 758 Mary Nguriareng’ 7895        

a)         Enter the data shown above into a spreadsheet giving it an appropriate title centre and bolded across the worksheet. Save the workbook as CHAT 001. And rename the worksheet as June records                                                                                                                   (10 marks)

b)         Copy the data to a new worksheet and add the details of producer James Kirega of area 1O1B, id 452 with quantity of produce of 2,700kg in an appropriate row.                               (1 mark)

c)         Insert borders after every cell and every row.                                                                        (2marks)

d)         Use a function to calculate the gross pay for the producer with id number 115 given that the price per KG of the produce is Sh.41 .00                                                                      (2 marks)

e)         Use the formula for gross pay obtained for producer John Kamau to calculate the gross pay for all the farmers                                                                                                            (2 marks)

f)         Use if function to Calculate transport cost for all the producers given that transport is charged per Kg is as follows                                                                                                    (5 marks)

AREA Price per kg
101B 5.00
20Z 3.50
 79A 4.00

g)         Insert the value 20% in cell E14. Using absolute cell referencing calculate Deductions given that the deduction is 20% of the cost.                                                                         (4 marks)

h)         Using a function calculate the net pay given that Net pay is Gross pay — deductions and transport cost                                                                                                                  (4marks)

i)          Format the columns containing currency values to currency with 2 decimal places and prefix Ksh. Rename the worksheet PRODUCE PAY and save it as CHAI 002                         (3marks)

j)          Arrange the records in ascending order of the producer id                                         (2 marks)

k)         By applying suitable filter condition, display records for all producers except those from area 79A. Save it as CHAT 003                                                                                      (4 marks)

1)         Use subtotals function to calculate subtotals for the quantity delivered, gross pay and net pay from each area.                                                                                                        (3 marks)

m)        Create an embedded pie chart showing the total quantity of produce delivered for each area the chart should have the following details.)

a.         Chart title Area Total produce delivered

b.         Legend Position Right

Save it as CHART 1                                                                                       (5marks)

n)         Print CHAT 001, CHAI 002, and CHART 1 in landscape orientation.                   (3 marks)

2.         TechBit Computer College and Consultancy centre have set up a special advertising campaign to market its course. As a DTP expert, you have been appointed to assist the marketing team in designing a brochure. The rear page of the brochure is given in the next sheet

The fonts, borders and graphics used should be relevant to the publication as may be available in your software

(a)        Prepare a publication with the following specifications:

i)          Paper size set to A, landscape                                                                                     (2 marks)

ii)         Set margins to 10mm (0.4”) all round                                                                         (2 marks)

iii)        Set the publication to be in three columns measuring 88mm, 84mm and 93mm respectively

 (2 marks)

iv)        Set the space between columns to 6mm                                                                     (2 marks)

(b)        Key in the text as shown in columns 1-3 in the sample provided. Save your work as

sample 1                                                                                                                      (8 marks)

(c)        In column (title pane), format the various items as follows:

i)          Set the transparency of the fill colour to 25%                                                (2 marks)

ii)         Bold and italicize the mission statement heading                                           (2 marks)

iii)        Italicize and centre the mission statement                                                     (2 marks)

iv)        Set the vertical alignment of the text box bearing the words The Best College for You to middle                                                                                                 (1 mark)

v)         Apply blue and green fill to stars on your left and right respectively as shown in the sample                                                                                                             (3 marks)

vi)        Place the clipart and word art appropriately as shown in column 3 of the sample.

 (4 marks)

vii)       Save your work as sample 2                                                                            (1 mark)

(d)       In column I (Liaison offices), format the text as follows;

i)          Apply shadow to the title Liaison Offices and set the font size to 20           (2 marks)

ii)         Apply double underline to each of the telephone numbers                            (2 marks)

iii)        Set the colour of the names of the buildings to blue                                      (2 marks)

iv)        Insert the footer: Registration and enquiries at our head office                      (1 mark)

v)         Apply blue outline to the textbox bearing the title Liaison Offices             (1 mark)

(e)        Create a mailing coupon as it appears in column 2                                                     (2 marks)

(f)        Format the mailing coupon as follows:

i)          Bolden and centre the address as shown in the sample                                  (2 marks)

ii)         Draw and enter Place stamp here caption at the top right corner                 (2 marks)

iii)        Save your work as sample 3                                                                            (1 mark)

(g)        Print Sample 1, Sample2 and Sample 3                                                                      (3 marks)

END