Basic Education Certificate Examination · Integrated Science

Systems, Interactions and Applied Science

35 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 35 questions

  1. Which soil particle has the smallest diameter, giving it high water-holding capacity but poor drainage?
  2. What agricultural term describes the vertical section of soil displaying its distinct horizontal layers (horizons)?
  3. Which soil layer contains the highest concentration of dark organic matter (humus) and plant-available nutrients?
  4. Which soil conservation practice involves ploughing and planting crops across the slope along lines of equal elevation?
  5. Which primary plant macronutrient is primarily responsible for vigorous leafy vegetative growth and dark green leaves?
  6. A severe deficiency of which plant macronutrient results in poor root growth and stunted purplish leaves in maize crops?
  7. What agricultural system involves growing different crops in a planned sequential order on the same plot of land over time?
  8. Why are leguminous crops such as cowpea, groundnut, and soybean typically included in a crop rotation schedule?
  9. Which agricultural farming system combines the cultivation of field crops with the rearing of domestic farm animals on the same farm?
  10. Which of the following farm animals is classified as a polygastric ruminant possessing a complex four-chambered stomach?
  11. What is the true glandular stomach in a ruminant animal where chemical and enzymatic digestion takes place?
  12. In poultry birds like chickens, what thick muscular organ grinds down swallowed seeds and grains with the aid of ingested grit?
  13. Which water treatment process involves adding aluminium sulphate (alum) to clump together fine suspended clay particles?
  14. What is the primary objective of adding chlorine gas or sodium hypochlorite to municipal drinking water supplies?
  15. Which serious water-borne bacterial disease causes severe watery diarrhea, rapid dehydration, and is spread by contaminated water?
  16. Which freshwater snail species acts as the intermediate host for the parasitic blood flukes that cause Bilharzia (Schistosomiasis)?
  17. What type of non-biodegradable waste presents the greatest modern environmental threat to marine life and drainage systems?
  18. What is the primary environmental cause of modern global climate warming observed across the planet?
  19. Which of the following agricultural practices directly causes soil erosion and rapid nutrient depletion on sloping farmlands?
  20. What term describes the organic farming practice of covering bare soil surface with dry grass, straw, or leaves?
  21. Which essential compound is added to acidic agricultural soils to neutralize excess acidity and raise the soil pH?
  22. What is the main vector responsible for transmitting African trypanosomiasis (sleeping sickness) to humans and nagana to cattle?
  23. Which viral disease in poultry birds causes high mortality, breathing difficulty, nervous tremors, and greenish diarrhea?
  24. What is the primary method of preventing lethal viral outbreaks like Newcastle disease in commercial poultry farms?
  25. Which casting or forming technique uses molten metal poured into a sand mould to manufacture heavy agricultural tool parts?
  26. Which non-ferrous alloy composed primarily of copper and zinc is widely used for making musical instruments and decorative hardware?
  27. What metallic alloy consists primarily of copper and tin, and was historically used to cast royal Akan and Ghanaian artworks?
  28. Why is mild steel galvanised by dipping it into molten zinc before being used as roofing sheets?
  29. What type of simple agricultural tool is traditionally used for turning soil, digging planting holes, and harvesting root tubers?
  30. What is the primary function of a builder's spirit level when constructing block walls?
  31. Which piece of personal protective equipment (PPE) is strictly required to protect the eyes from chemical splashes in a school laboratory?
  32. What first-aid procedure should be immediately administered if dilute acid splashes onto a student's skin in the science lab?
  33. What term describes the intentional conservation of electrical energy by switching off unneeded lights and appliances?
  34. What is the primary role of the ozone layer located in the stratosphere of the Earth's atmosphere?
  35. Which synthetic industrial chemicals were primarily responsible for causing the seasonal depletion (hole) in the stratospheric ozone layer?

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