Automated PLE Science Exam Paper Generator

✅ 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) 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) Mulching: Conserves soil moisture (and suppresses weeds) (b) Pruning: Removes unwanted extra branches and prevents rotting of fruits (c) Thinning: Prevents overcrowding of plants in the garden (d) Weeding: Removes unwanted competitive plants from the garden

💡 Examiner Deduction Warning: Cognitive Level: Comprehension (C). Strict 1-to-1 matching.

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

(a) The tin can crushed / collapsed inward. (b) Cold water condensed the steam inside into liquid water, creating a partial vacuum (low air pressure) inside. The higher atmospheric air pressure outside crushed the can inward. (c) Condensation (gas/steam turning into liquid water).

💡 Examiner Deduction Warning: A classic 4-mark PLE 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) 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) (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) (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) 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) Foot rot. (b) Wet, muddy, and dung-filled dirty floors. (c) (i) Regularly trim overgrown hooves (ii) Walk goats through a copper sulphate footbath (iii) Keep pens clean and dry (use slatted floors).

💡 Examiner Deduction Warning: Practical veterinary question.

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

(a) An ordinary pit latrine requires a tight-fitting lid over its drop hole, whereas a VIP latrine must be left open without a lid at all times. (b) Wood ash (or soil/lime) is sprinkled over the feces. Its role is to dehydrate the waste, neutralize smells, and raise pH to destroy pathogens. (c) Never throw hard materials (like stones, pads, or newspapers) into the bowl to prevent blockage. TOPIC 12: THE REPRODUCTIVE SYSTEM

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

(a) A physical change does not take place in living things and is reversible, whereas a biological change takes place exclusively in living organisms and is irreversible. (b) (i) Melting (ii) Evaporation / Boiling (c) Evaporation

💡 Examiner Deduction Warning: Clear distinction in reversibility and living vs non-living matter.

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

(a) Accept any two of: - Causes liver cirrhosis (liver damage) - Causes high blood pressure and heart attacks - Causes brain and nerve damage (loss of memory / coordination) - Causes stomach ulcers (b) Accept any two of: - Leads to domestic violence and child neglect - Leads to poverty through wasting family income on alcohol - Leads to family breakdown and divorce - Leads to loss of jobs and unemployment

💡 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) (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.