Lebanese Baccalaureate - General Sciences (GS) case studies
Lebanese Baccalaureate - General Sciences (GS) · Put your knowledge to work in context.
The Lebanese Baccalaureate in General Sciences (Sciences Générales) is the national school-leaving diploma for students in the general-sciences stream, taken at the end of secondary school and used for university admission in Lebanon and abroad. It is intended for students who want a science-heavy preparation: mathematics carries the largest share of the paper, followed by physics and chemistry, then biology, with an integrated scientific section that asks you to reason across disciplines rather than recall one syllabus. The Lebanese Baccalaureate - General Sciences (GS) case studies are 5 cases and about 2,532 words.
1Titrating an Unknown Acid with a Contaminated NaOH Solution
A student prepares a standard solution of sodium hydroxide by dissolving 4.00 g of NaOH pellets in distilled water to make 1.00 L. The label on the pellets notes they have absorbed water and are only 92% pure NaOH by mass (the rest is inert).
476 words, about 2 min2Projectile Motion and Energy in a School Sports Launch
A physics club builds a spring-loaded launcher for a school competition. A ball of mass 0.20 kg is launched from ground level at 12 m/s at an angle of 40° above the horizontal.
444 words, about 2 min3Interpreting a Family Pedigree for a Recessive Disorder
A couple, Amal and Karim, seek genetic counselling. Amal's brother has an autosomal recessive disorder caused by mutations in a single gene.
510 words, about 3 min4Integrated Analysis of a Eutrophicated Lake
A freshwater lake near a farming region receives runoff containing nitrate fertiliser. Over three summers, dissolved oxygen (DO) in the bottom water falls from 8 mg/L to 2 mg/L, and chlorophyll-a (a measure of algal biomass) rises from 5 µg/L to 60 µg/L.
583 words, about 3 min5Radioactive Decay, Half-Life, and Medical Dosimetry Reasoning
A hospital uses a radioactive isotope with a half-life of 6.0 hours for a diagnostic scan. A vial is calibrated to contain 800 MBq at 08:00 on Monday.
519 words, about 3 min