2007 June questions – Practical-work Test

1. In the preparation of soap from palm oil and dry cocoa pods, six steps indicated below are required.

Study the steps below carefully and answer the questions that follow.

Step I: The mixture is boiled and stirred for some time and allowed to cool.

Step II: Water is added to the cocoa pod ash, stirred and filtered.

Step III: Dry cocoa pods are burnt to ash.

Step IV: Palm oil is poured into a can and heated.

Step V: The crust that forms on top of the liquid is removed and washed with little water.

Step VI: The solution is poured into the hot palm oil.

1 (a)
Rearrange and copy the steps in the correct sequence.

1 (b)
Name the chemical process involved.

1 (c)
What substance could have been used to speed up the precipitation of the soap?

1 (d)
What chemical substance is present in the cocoa pod ash?

1 (e)
State two effects of impurities associated with a crude soap product?

1 (f)
Briefly describe a procedure you would use to confirm that the product formed is soap?


2. Figure 1 is an illustration of a rectangular block of metal with dimensions x, y and z.

Study the figure carefully and answer the questions that follow.

Figure 1

 

Wassce Integrated Science, practical work test 2007

2 (a)

(i) Measure and record the lengths x, y, z in centimetres (cm)

(ii) Convert the values you obtained for x, y and z in (i) into metres (m)

2 (b)
If the weight of the block is 10 N, calculate

(i) Its volume, V

(ii) The density of the metal. [Assume g=10 ms−2]

2 (c)
Calculate the cross-sectional areas XA, XB and XC of faces A, B and C respectively of the rectangular block.

2 (d)
(i) Given that the block weighs 10 N, calculate the ratios:

(α) 

(β) 

(γ) 

(ii) Assuming the block is laid on each surface in turn on a table, what would be the significance of the ratios you have calculated in 2(d) (i)?

2 (e)
What is the relationship between the surface areas of the block and the values you calculated in 2(d) (i)?


3. Figure 2 is an illustration of organisms associated with farm animals.

Study the figure carefully and answer the questions that follow.

Figure 2
 wassce science 2007 paper 3 question 3A

wassce science 2007 part 3 question 3B

3 (a)
Identify each of the organisms A and B, without giving reasons.

3 (b)
In which parts of the host do organisms A and B live?

3 (c)
State two features that make each of the organisms A and B successful in their habitats.

3 (d)
State two effects of

(i) Organism A on the host

(ii) Organism B on the host

3 (e)
State one method of controlling each of the organisms A and B.


4. Figure 3 is an illustration of different types of teeth.

Study the figure carefully and answer the questions that follow.

Figure 3
 A waec wassce integrated science 2007, paper 3 question 4    waec wassce integrated science 2007, paper 3 question 4

C waec wassce integrated science 2007, paper 3 question 4     Dwaec wassce integrated science 2007, paper 3 question 4 

4 (a)
Identify each of the types of teeth illustrated.

4 (b)
Describe the structure of tooth C.

4 (c)
Give three structural differences between teeth A and B.

4 (d)
State one function of each type of tooth.

4 (e)

(i) Name the group of animals which possess all the types of teeth illustrated in Figure 3.

(ii) Support your answer with reasons.


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5 thoughts on “2007 June questions – Practical-work Test”

  1. I. Will like to. save all my browsed questions on my phone but I don’t have PDF on my phone and I can’t download the PDF on the phone.please I want you to help me have past questions on my phone.

    1. Hi Afun, You may need to delete some of your rarely used apps so you can download a PDF or ebook reader unto your phone. This Ebook and PDF reader is quite a small-sized android app and you should be able to download it unto your phone so you can read through the past questions (and answers) offline, on your phone, as and when you wish.

  2. I congratulate you for this initiative. How can I subscribe and download the questions and sketches? I wait for reply. Thanks

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