Automated PLE Science Exam Paper Generator

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

(a) (i) Oxygen (O2) (ii) Carbon dioxide (CO2) (b) Accept any two of: - Blows off roofs of houses and destroys buildings - Causes soil erosion (wind erosion) - Spreads airborne diseases and raises blinding dust - Blows down and destroys crops in gardens - Causes boat accidents on water bodies

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

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

(a) Accept any two of: - High environmental temperature / dry hot weather - High fever - Direct injury or physical blow / punch to the nose - Nose picking (damaging delicate blood vessels) - Rupture of delicate blood capillaries due to high blood pressure (b) Accept any two of: - Pinching the soft part of the nose firmly for 5 to 10 minutes - Applying a cold compress or ice pack over the bridge of the nose - Leaning the head slightly forward (never backward, to prevent swallowing blood) - Loosening tight clothing around the neck and chest

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

✅ 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) Kwashiorkor. (b) Marasmus. (c) Proteins. (d) Milk / Eggs / Fish / Mukene / Beans / Groundnuts.

💡 Examiner Deduction Warning: Clear 4-mark clinical comparison.

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

(a) Chemical change (b) Physical change (c) Biological change (d) Physical change

💡 Examiner Deduction Warning: Cognitive Level: Comprehension (C). Exactly 1 mark per correct classification.

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

(a) To suck out foul odours from the pit and expel them high into the air. (b) To trap flies so they cannot escape and spread disease germs. (c) (i) Wind blowing across the top of the vent pipe draws out smelly gases continuously (ii) The latrine interior is kept dark, forcing air currents up the pipe.

💡 Examiner Deduction Warning: Classic 4-mark UNEB sanitation question.

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

(a) Volume: The loudness or softness of a sound (b) Pitch: The highness or lowness of a sound (c) Frequency: The number of vibrations (cycles) per second (d) Echo: Reflected sound

💡 Examiner Deduction Warning: Cognitive Level: Knowledge (K). Exact UNEB definitions required.

✅ 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.

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

(a) (i) Zinc can (negative terminal). (ii) Carbon / Graphite rod with brass cap (positive terminal). (b) It acts as the chemical electrolyte that allows ionic conduction of charges. (c) The active chemicals (zinc and ammonium chloride) are completely consumed by the chemical reaction.

💡 Examiner Deduction Warning: Zinc serves as both the container and the negative terminal.

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

(a) Accept any two of: - Cold-blooded (poikilothermic) - Live both on land and in water - Lay eggs in water covered in jelly - Undergo external fertilization - Breathe through moist skin and lungs (gills at larval/tadpole stage) (b) Accept any two of: - Fish breathe using gills throughout their lives, while adult amphibians breathe using lungs and moist skin - Fish have fins for swimming, while amphibians have limbs (legs) with webbed toes - Fish have scales covering their bodies, while amphibians have smooth moist skin without scales - Fish have a lateral line to detect vibrations, while amphibians detect sound using eardrums

💡 Examiner Deduction Warning: Cognitive Level: Comprehension (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) Accept any two of: - Common diseases affecting people in the community - Pit latrine and sanitation coverage - Immunization coverage among infants and children - Sources of safe drinking water - Nutritional and food security status (b) Accept any two of: - Helps identify community health needs and challenges - Determines the health and sanitation status of the community - Helps government and NGOs plan and allocate medical resources effectively - Creates health awareness and sensitization among community members

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

✅ 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) A short circuit is an accidental direct connection between live and neutral wires with near-zero resistance, resulting in dangerously high current flow. (b) 1. Frayed, worn-out, or damaged insulation on cables. 2. Overloading multi-plug sockets with heavy appliances. (c) Ordinary water contains dissolved minerals and is a good electrical conductor, which will shock and electrocute anyone attempting to put out the fire.

💡 Examiner Deduction Warning: Never use water on electrical fires—use dry powder or carbon dioxide fire extinguishers.

✅ 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.