Automated PLE Science Exam Paper Generator

✅ 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) (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) 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) 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) 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) 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) Testosterone. (b) Any two of: Deepening/breaking of the voice, growth of facial hair (beards), broadening of shoulders/chest, or initiation of sperm production. (c) Any one of: Growth of pubic hair, growth of hair under the armpits, or pimples on the face.

✅ 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) 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) 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) Accept any one of: - Weeds compete with crops for sunlight, water, space, and soil nutrients - Weeds harbor insect pests - Weeds spread plant diseases - Weeds make harvesting difficult (b) Accept any two of: - Hand weeding (slashing / uprooting) - Mulching the garden - Practicing crop rotation - Planting cover crops - Digging / hoeing weeds (c) Staking / trellising / propping (providing support to climbing stems)

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

✅ 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) (i) Flatworms (Platyhelminthes) (ii) Roundworms (Nematodes) (b) Accept any two of: - Eating infected, poorly cooked / raw meat containing tapeworm cysts - Eating unwashed fruits and vegetables contaminated with worm eggs - Walking barefoot on soil contaminated with hookworm larvae (hookworms penetrate bare skin) - Drinking unboiled water contaminated with worm eggs

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

✅ 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) 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).