SCIENCE FINAL MOCK

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2019 INTEGRATED SCIENCE FINAL SUPER MOCK (FOR WASSCE CANDIDATES)👇👇 👇👇

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Authentic questions and answers Arena

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*QUESTION 1*

(a) (i) what is short-sightedness?
      (ii) Describe briefly how shorts sighted ness could be corrected.

      (iii) State the main causes of short-sightedness in humans.

(b) (i) What is grafting?
 
      (ii) State three factors to be considered when grafting  ornamental  plant.
      
      (iii) Describe  how pollination  takes place in an insect-pollinated flower.

(c) (i) What is meant by dispersal  of seeds?

    (ii) Give one difference  between  a scion and a stock.

  

(d) Define the following  terms:
    (i) de-amination
    (ii) ultra- filtration
    (iii) selective  re-absorption.

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*QUESTION 2*

(a). (i)  Differentiate between  voluntary and involuntary  actions.

     (ii) A boy accidentally touches a hot object and quickly withdraws his hand. Explain *briefly* the mechanism involved in this action.

(b) A piece of magnesium  ribbon  was placed in a beaker containing dilute hydrochloric  acid.
    (i) Name the product formed.
    (ii) Write a balanced equation for the reaction that takes place.
    (iii)  If 2.0g of magnesium  ribbon were placed in the acid, how many moles of hydrochloric acid would be required  to react with the ribbon ?

*[Mg =24, H= 1, Cl= 35.5]*

(c) (i) what is salt?
     (ii)  why is sulphuric acid a stronger acid than ethanoic acid?

(d) (i) Name three types of dissolved substances that may present in water. 

     (ii) Describe *briefly* an experiment to investigate the presence of dissolved  substances in water.

*QUESTIONS  3*

(a)(i)  State three harmful effects of radioactivity
     (ii) State three  precautions to be taken to prevent the harmful effects of radiations on humans.
   (iii) what is radioisotopes?

(b) (i) What is meant by the rate of Chemical reaction?
      (ii) Explain how each ofvthe following  factors affect the rate of a chemical  reaction :

     (i) concentration ;
     (ii) Surface area. 

(iii) what is sea breeze?
(iv) Sketch and label a diagram to show  the occurrence of sea breeze.

(c) Differentiate  between air mass and storm.

(d) State four effects of ait mass on the environment.

*QUESTION 4*

(a) The atomic number of atom *Y*  is 17 and its mass is 35.

(i) Indicate the number of protons, electrons  and neutrons in the atom.
(ii) Draw the electronic configuration of the atom showing the positions of the protons and electrons as well as the arrangement of the electrons in the various shells.

(b) Distinguish  between  covalent bond and  an ionic bond

(c) Differentiate between  monoculture and polyculture in fish farming.

(d) (i)  State two ways in which fish farming is important to the community.

     (ii) write down three factors that influence  the choice of site for a fish pond.

*QUESTION 5*

(a)(i) Name two symptoms of each of

   (i)maize smut;
   (ii) cassava mosaic.

(ii) Name three varieties of oil palm.

(b) State two conditions each under which the following  seedbeds are used :
    (i) raised seedbeds;
    (ii)  sunken seedbeds.

(ii)  Distinguish  between  grain and cereal.
(iii)  Give one example  of a seed that qualifies to be both a grain and cereal.

(c) (i) What are _macronutrients?_
(ii) List three macronutrients required  for crop production.
(iii) State two ways in which nutrients  are lost from the soil.

(d) (i)  Name two organism involved in nitrogen cycle.
     (ii) State two processes in the nitrogen cycle that
    (a) adding nitrogen to the soil.
    (b) remove nitrogen from the soil.

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