Automated PLE Science Exam Paper Generator

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

(a) Zero grazing (stall feeding) (b) Farmyard manure (FYM) / Compost manure (c) Accept any two of: - Easy collection of animal dung and urine for manure and biogas - Protects cattle from tick-borne diseases and pasture parasites - Requires a small piece of land - High milk production due to less energy wasted walking - Protects crops from being destroyed by roaming cattle

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

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

(a) Wheel and axle (b) Accept any two of: - Steering wheels of motor vehicles - Screwdrivers when tightening screws - Door knobs for opening doors - Bicycle pedals and handlebars - Pencil sharpeners (c) Friction (frictional force)

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

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

(a) Accept any two of: - Accessibility of the site - Nearness to a water source for watering young seedlings - Type and drainage of soil - Availability of adequate land - Security against stray livestock and fire outbreaks (b) Accept any two of: - Provides timber and building poles for sale - Provides firewood and wood fuel - Provides shade and purifies the air - Can be used for apiculture (bee farming) - Creates employment opportunities

💡 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) Tsetse fly (b) Larva stage (maggots) / Adult fly (c) Blood (from humans and livestock) (d) Through biting and sucking blood (injects saliva containing Plasmodium parasites)

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

✅ 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) 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) (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) Static electricity consists of electric charges at rest on a surface, whereas current electricity is the continuous flow of charges (electrons) through a conductor. (b) By rubbing the plastic ruler vigorously with a dry cloth (or dry hair), causing transfer of electrons through friction. (c) 1. Installing a functional lightning conductor with sharp copper spikes. 2. Ensuring the earth wire of the arrestor is deeply grounded in moist soil.

💡 Examiner Deduction Warning: State that charges in current electricity are in continuous motion.

✅ 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) Steam (or hot water droplets). (b) A scald. (c) Immediately dip/place the injured arm in clean cold water. (d) Any one of: Use insulators/holder cloths to remove covers, avoid playing near cooking stoves, or cook from a raised place.

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

(a) Primary Health Care. (b) (i) Community participation (ii) Affordability / Accessibility / Equity / Appropriate technology. (c) Because preventive measures (sanitation, clean water, immunisation) cost very little compared to expensive drugs and hospital admission.

💡 Examiner Deduction Warning: Reward clear economic and social understanding.

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

(a) Chlorophyll (b) Ferns make their own food through photosynthesis (autotrophic nutrition), whereas mushrooms cannot make food and absorb nutrients from decaying organic matter (saprophytic nutrition) (c) Accept any two of: - Mosses - Liverworts - Horsetails - Algae - Hornworts

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

✅ 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) Social insects. (b) Some insects are eaten as food (grasshoppers), some pollinate crops, or some provide honey and wax (honeybees). (c) Any two of: Bush burning, Deforestation, Spraying chemical pesticides, or Swarm/wetland drainage.