Automated PLE Science Exam Paper Generator

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Accept any two of: - Crushed oyster shells / snail shells - Crushed eggshells - Bone meal (crushed animal bones) - Crushed Mukene fish (b) Accept any two of: - Feeding layers on a balanced diet rich in calcium and proteins - Providing clean fresh drinking water at all times - Vaccinating and deworming birds regularly to control diseases - Maintaining clean, well-ventilated, and dry poultry housing with comfortable laying nests - Providing adequate artificial light to stimulate laying

💡 Examiner Deduction Warning: Cognitive Level: Comprehension & Application (C & A).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Any two: Tendons, Ligaments, Cartilage. [1 mark] (b) A tendon attaches muscle to bone, whereas a ligament joins bone to bone at a joint. [1 mark] (c) (i) Synovial fluid lubricates the articulating bone surfaces. (ii) Smooth articular cartilage cushions bone ends and prevents direct bone-to-bone contact. [2 marks]

💡 Examiner Deduction Warning: Use the mnemonic BLB (Bone-Ligament-Bone) and MTB (Muscle-Tendon-Bone) to prevent reversing definitions in part (b).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Lukewarm water. (b) Lukewarm water opens up sweat pores to let out excess body heat, whereas very cold water causes shivering (which reflexively increases internal body heat production). (c) Any two of: Passing out stools with blood and mucus, severe abdominal/stomach pain, high fever, or vomiting. 📝 Would you like me to compile these exact exam questions into a printable PDF assessment worksheet for your class's end-of-term revision?

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Soil drainage (or water retention capacity / porosity) (b) To prevent soil particles from falling into the collecting beaker / to filter soil from water (c) Sand soil drained fastest; because sand soil has larger particles with larger air spaces (pore spaces) that allow water to pass freely

💡 Examiner Deduction Warning: Cognitive Level: Application (A).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Identical twins are formed from one ovum fertilized by one sperm cell which later splits, while fraternal twins are formed from two separate ova fertilized by two different sperm cells. (b) 1. They are always of the same sex. 2. They look exactly alike (have identical features).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Because they are recovering from illness and their damaged body tissues need repair and rebuilding. (b) Proteins (and vitamins). (c) It adds bulk to food and stimulates peristalsis to prevent constipation. (d) Sukuma wiki / Cabbage / Whole grain cereals / Unpeeled fruits.

💡 Examiner Deduction Warning: Award full marks for precise physiological explanations.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) (i) Black jack: Animal dispersal (epizoochory) (ii) Sycamore: Wind dispersal (b) Accept any two of: - Have wing-like structures (e.g. sycamore) - Have parachute of fine hairs / pappus (e.g. dandelion, tridax) - Are very small and light in weight - Are dust-like (e.g. orchids)

💡 Examiner Deduction Warning: Cognitive Level: Comprehension (C).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Step 1: Measure one litre of clean boiled water and pour it into a clean container. Step 2: Add eight level teaspoons of sugar into the water. Step 3: Add one level teaspoon of salt and stir thoroughly until completely dissolved. (b) To replace lost water and essential mineral salts (prevents severe dehydration)

💡 Examiner Deduction Warning: Cognitive Level: Application (A). Strict recipe proportions: 1 litre water + 8 level teaspoons sugar + 1 level teaspoon salt.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) (i) Two parallel lines: one long thin line (+) and one short thick line (-). (ii) A line with a gap and a raised lever not making contact. (b) 1. Each bulb operates at full voltage and glows brightly. 2. If one bulb burns out or is switched off, the remaining bulbs in other branches stay on.

💡 Examiner Deduction Warning: Independent branch operation is the main advantage of parallel circuits.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Saanen / Toggenburg / Alpine / Anglo-Nubian (b) Mohair (c) Accept any two of: - Goats require less pasture, care, and attention than cattle - Goats require less space and can be kept on small pieces of land - Goats reproduce and multiply faster than cattle (shorter gestation period) - Goats have lower water requirements and survive better in harsh dry areas - Cheaper to buy and maintain with quicker financial turnover

💡 Examiner Deduction Warning: Cognitive Level: Knowledge & Comprehension (K & C).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Any two of: Prostate cancer, Prostate enlargement, Testicular cancer, Hydrocele, or Infertility. (b) Allows the mother to regain her physical health/strength before the next pregnancy (or allows her time to nurse the newborn child properly). (c) Any one of: The vagina has a larger mucosal surface area exposed to seminal fluid. Seminal fluid remains inside the vagina for a longer duration of time. The delicate vaginal lining is prone to micro-tears during intercourse.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Dehydration (loss of water and essential mineral salts). (b) Any two of: Sunken eyes, dry lips, pale skin that does not snap back when pinched, or extreme body weakness. (c) Administering Oral Rehydration Solution (ORS) or extra fluids like coconut water.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Raised dish drying rack (or Plate stand). (b) (i) Keeps plates away from crawling insects, dogs, and chickens (ii) Prevents mud and dust splashes from dirtying clean plates. (c) The ultraviolet (UV) rays of sunlight kill harmful bacteria on the plates.

💡 Examiner Deduction Warning: Award 4 marks for complete sanitation rationale.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) (1) Cervical, (2) Thoracic, (3) Lumbar, (4) Sacral / Sacrum, (5) Caudal / Coccyx [1 mark] (b) (i) Cervical: 7 vertebrae [1 mark] (ii) Lumbar: 5 vertebrae [1 mark] (c) Protects the spinal cord // Supports the weight of the head and upper body. [1 mark]

💡 Examiner Deduction Warning: Spelling of 'Cervical', 'Thoracic', 'Lumbar', 'Sacral', and 'Coccyx' must be accurate. Ensure the total adds up to 33.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) A fracture is a broken or cracked bone in the body. [1 mark] (b) In a simple fracture, the broken bone remains inside unbroken skin; in a compound fracture, the broken bone tears through muscle and pierces outside through the skin. [1 mark] (c) (i) Splints: Immobilize and hold the broken bone in one fixed position to prevent movement. [1 mark] (ii) Arm sling: Supports, immobilizes, and elevates a fractured or injured arm. [1 mark]

💡 Examiner Deduction Warning: In (a), writing 'a broken bone' without mentioning 'cracked' loses precision. In (c)(i), 'keeps bone in one position' is the official mark-earning phrase.