Automated PLE Science Exam Paper Generator

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

(a) Test-Tube D (Salty water) (b) Oxygen was absent (driven out by boiling and blocked by the oil layer) (c) To keep the air completely dry by absorbing moisture (d) Oxygen and Moisture (water)

💡 Examiner Deduction Warning: Candidate must correctly identify the missing factor in each test tube.

✅ 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) (i) Sanitation: The general cleanliness of the environment to promote public health / steps taken to keep an area clean. (ii) Personal hygiene: The cleanliness of the body and the materials used to clean it. (b) Accept any two of: - Sweeping rubbish from the compound - Picking up littered rubbish and disposing of it in dustbins or rubbish pits - Slashing tall grass and clearing bushes around the compound - Draining stagnant water to destroy mosquito breeding grounds - Scrubbing and cleaning latrines and urinals regularly

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

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

(a) (i) Biceps (ii) Triceps [2 marks - Reject: Flexors / Extensors] (b) Muscles produce movement and locomotion // Cardiac muscles pump blood // Diaphragm/intercostal muscles aid breathing // Sphincter muscles control urine release [1 mark] (c) Prevents bone deformities // Prevents backaches, neck, and chest pains // Aids proper food digestion // Helps internal organs function properly [1 mark]

💡 Examiner Deduction Warning: In part (a), candidates who write 'flexors and extensors' score 0. Examiners require the proper anatomical names: Biceps and Triceps.

✅ 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) Vena cava (Superior and Inferior vena cava) (b) Oxygenated blood (c) Accept any two of: - Have thick muscular walls to withstand high blood pressure from the heart - Have narrow lumen to maintain high pressure - Have elastic walls to expand and recoil as blood pulses - Have no valves (except at the base of the aorta and pulmonary artery)

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

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

(a) Accept any two of: - Overgrown bushy compound and tall grass - Presence of stagnant water pools - Scattered empty tins, plastic bottles, and broken containers holding water - Poor disposal of human faeces and unhygienic latrines - Open, rotting rubbish heaps near classrooms (b) Accept any two of: - Malaria - Bilharzia (Schistosomiasis) - Cholera - Typhoid fever - Dysentery

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

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

(a) Afforestation is the massive planting of trees in an area where there have never been trees before. (b) (i) To get land for farming and settlement (ii) To get wood fuel (firewood and charcoal) and timber. (c) Tree roots that absorb excess rainwater are destroyed, and bare soil easily allows rapid surface runoff into rivers and lakes.

💡 Examiner Deduction Warning: Mark strictly on environmental cause-and-effect.

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

(a) Drowning is dying due to lungs being filled with water, whereas near drowning is a condition where lungs are filled with water and breathing fails, but the casualty is not yet dead. (b) Any two of: Inability to swim, capsizing of boats in a storm, floods, or getting a muscle cramp while in deep water. (c) Pull them out of the water immediately and apply mouth-to-mouth resuscitation (Kiss of life) followed by chest compressions (CPR).

✅ 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) 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) 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) Paraffin is a corrosive poison. Inducing vomiting will cause the chemical to burn the throat and esophagus a second time as it flows back up, or it can be inhaled into the lungs. (b) Give them plenty of cold milk to coat the stomach lining and dilute the chemical, then rush them to a hospital immediately. (c) Induce vomiting to remove the toxic substance from the stomach and give them milk to dilute the toxic concentrations. 💡 Would you like me to compile these exact evaluation questions into a ready-to-print, beautifully formatted PDF worksheets file for your classroom tests?

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

(a) Ingestion of human faeces containing tapeworm eggs by free-roaming pigs. (b) Pork tapeworm (Taenia solium). (c) (i) Inspecting all pork thoroughly before sale (ii) Cooking pork thoroughly until well done (iii) Confining pigs in pens (iv) Ensuring all people use latrines.

💡 Examiner Deduction Warning: Clear 4-mark health & sanitation integration.

✅ 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.