Automated PLE Science Exam Paper Generator

✅ 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) Siltation is the deposition and accumulation of eroded soil particles into water bodies. (b) Soil erosion. (c) Any two of: It causes flooding in local compounds. It blocks food and light for aquatic life. It reduces the oxygen supply to fish, leading to death.

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

(a) Identical twins are formed from one ovum fertilized by one sperm cell which later splits, while fraternal twins are formed from two separate ova fertilized by two different sperm cells. (b) 1. They are always of the same sex. 2. They look exactly alike (have identical features).

✅ 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):

(i) Sorting: Separates clothes by color to prevent staining, and by texture/dirtiness to protect delicate fabrics. (ii) Soaking: Softens and dissolves stubborn dried dirt and stains, making scrub-washing easier.

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

(a) Soil drainage (or water retention capacity / porosity) (b) To prevent soil particles from falling into the collecting beaker / to filter soil from water (c) Sand soil drained fastest; because sand soil has larger particles with larger air spaces (pore spaces) that allow water to pass freely

💡 Examiner Deduction Warning: Cognitive Level: Application (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) 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) 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) 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) 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) The first yellowish breast milk produced by a mother during the first few days after giving birth. (b) (i) Rich in maternal antibodies that provide immediate passive immunity against infections (ii) Acts as a mild laxative to clear meconium from intestines. (c) Goitre.

💡 Examiner Deduction Warning: Standard 4-mark UNEB question on infant health.

✅ 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) 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) 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).