Libya Secondary Certificate - Scientific case studies
Libya Secondary Certificate - Scientific · Put your knowledge to work in context.
Topics on this exam: Arabic Language, English Language, Mathematics, Physics, Chemistry, Biology, Islamic Education, and National and Social Education. The Libya Secondary Certificate - Scientific case studies are 5 cases and about 3,472 words.
1A Wall Magazine Line Under Dispute
The Arabic language club at a secondary school in Sabha is preparing a wall magazine for the school anniversary. A student, Huda, submits the opening line: «إنّ العلمَ نورٌ يُضيءُ دروبَنا، وما أجملَ أن نطلبَه». A second student, Nasser, objects before printing: he says «العلمَ» must be مرفوع after إنّ, that «ما أجملَ» is an ordinary question rather than an exclamation, and that «نورٌ» would sound better as «نوراً». The supervisor has one day before printing, may make only one correction, and the principal requires both grammatical accuracy and a clearly exclamatory meaning.
732 words, about 4 min2The Banner Triangle and the Missing Brace
The science fair committee at a school in Misrata is building a triangular banner frame from three wooden rods that cannot be cut: 1.40 m, 1.80 m, and 2.60 m. Ahmed claims the frame is right-angled because the two shorter rods look square on the plan drawing and because 1.40 + 1.80 = 3.20 m is greater than 2.60 m, so the triangle is valid and the corner is 90°. Sara is asked to check with the cosine rule. The committee must decide whether to add a diagonal brace at the largest angle, and whether the 3.00 m of reinforcing tape in the store is enough to run along the two shorter sides only.
732 words, about 4 min3Solar Pump on the School Farm
At a school farm in Gharyan, a 200 m² plot is to be irrigated by a small solar pump. The panel is rated 18 V and 5.5 A at standard test conditions, about 99 W. The pump is rated 12 V, 60 W and draws 5.0 A when running at 12 V. The two-core cable from the controller to the pump has a total loop resistance of 0.50 Ω.
729 words, about 4 min4Standardising the Laboratory Acid
The school laboratory has a bottle labelled hydrochloric acid, about 0.10 mol/dm³. Before a practical exam, the exact concentration must be established. There is a standard sodium hydroxide solution of 0.100 mol/dm³, a 25.0 cm³ pipette, a burette reading to ±0.05 cm³, phenolphthalein, and methyl orange. A student titrates 25.0 cm³ portions of the acid and records 24.20, 24.05, and 26.80 cm³.
651 words, about 3 min5Potato Strips and the Isotonic Point
Students at a school in Zliten investigate osmosis in potato tissue. Cylinders are cut to 3.0 cm length and 0.8 cm diameter, blotted, and placed for 30 minutes in sucrose solutions of 0.0, 0.2, 0.4, 0.6, and 0.8 mol/dm³. Final lengths are 3.3, 3.1, 3.0, 2.8, and 2.6 cm. One group's 0.6 mol/dm³ cylinder was left on the bench for 10 minutes before measurement and read 3.1 cm.
628 words, about 3 min