CONFIRMED WASSCE 2026 INTEGRATED SCIENCE PAPER 2 - ESSAY Time Allowed: 2 Hour 30 Minutes Answer four questions only. All questions carry equal marks. --- DITTO DITTO MIX WITH FAKE😇 State the class of lever to which each of the following simple machines belongs. [5 marks] broom (ii) claw hammer (iii) fishing rod (iv) secateurs bottle top opener (i) Define the term pressure. [2 marks] (ii) A regular concrete block weighing 5 kg, has dimensions 8 cm x 20 cm x 50 cm. Calculate the greatest possible pressure the block will exert on the ground. [g = 10 m s⁻²] [4 marks] (i) Give three reasons why poultry farms should be distanced from residential areas. [3 marks] (ii) Mention two methods of preserving poultry eggs. [2 marks] State two causes each of the following problems associated with reproduction in humans: [4 marks] ectopic pregnancy; (ii) infertility in men. Indicate whether each of the following substances is an element, a compound or a mixture: [5 marks] water; (ii) iron filings; (iii) glass; (iv) milk of magnesia; iodine crystals. A 0.04 g of copper metal reacts completely with 25 cm³ of 0.5 mol dm⁻³ H₂SO₄. Write a balanced chemical equation for the reaction. [3 marks] (ii) Calculate the molar mass of the copper metal. [3 marks] (i) Give two functions of the human ear. [2 marks] (ii) Arrange the following media in order of increasing speed of sound in each of them: solids, liquids, and gases. [3 marks] Give two advantages of clayey soil over sandy soil. [2 marks] (ii) State three symptoms of nitrogen deficiency in maize. [3 marks] State four ways in which biotic factors are useful in an ecosystem. [4 marks] (i) What is meant by the term modern technology? [2 marks] (ii) Give three reasons for the lack of improvement of technology in Ghana. [3 marks] (i) Explain the term convection as used in heat energy. [2 marks] (ii) Explain why convection cannot take place in solids. [3 marks] Differentiate between soil erosion and soil depletion. [2 marks] (ii) Give three effects of soil erosion on agricultural productivity. [3 marks] List three causes of indigestion in humans. [3 marks] (ii) State two ways of preventing tooth decay. [2 marks] A man with normal red blood cells is married to a woman who is a sickle cell carrier. With the aid of a genetic diagram, explain the genetic constitution of their children. [4 marks] (i) Explain the term sublimation. [2 marks] (ii) Name three substances that can sublime. [3 marks] Two lamps, each of resistance 3 Ω, are connected in parallel. The arrangement is then connected across a 4.5 V battery. Draw a circuit diagram for the arrangement. [2 marks] (ii) Calculate the effective resistance of the lamps. [2 marks] (iii) Calculate the total current in the circuit. [2 marks] Distinguish between green manure and farmyard manure. [2 marks] (ii) State three ways in which organic fertilizers are important to the soil. [3 marks] Explain the term identification as used in animal production. [3 marks] (ii) Describe two methods of identifying farm animals. [3 marks] What is a reflex action? [2 marks] (ii) Distinguish between excretion and egestion. [2 marks] List two groups of hydrocarbons. [2 marks] (ii) A group of hydrocarbons has the general formula CₙH₂ₙ. (α) Name the first two members of the group. [2 marks] (β) State the main reaction that members of this group undergo. [1 mark] END OF PAPER Follow the WASSCE BECE AND NOVDEC channel on WhatsApp: https://whatsapp.com/channel/0029VbBJ5Im17Emp9JqEYP05

Hey Blinky, good to see you again. Here's the solution for question 2(a)(ii): Step 1: Calculate the force (weight) of the concrete block. The force exerted by the block is its weight, which is given by the formula F = mg. F = 5 kg × 10 m s^-2 F = 50 N Step 2: Determine the smallest area. To exert the greatest possible pressure, the block must rest on its smallest surface area. The dimensions are 8 cm, 20 cm, and 50 cm. The smallest area is formed by multiplying the two smallest dimensions. A_min = 8 cm × 20 cm A_min = 160 cm^2 Step 3: Convert the smallest area to square meters. Since 1 m = 100 cm, then 1 m² = (100 cm)² = 10000 cm². A_min = 160 cm^2 × 1 m^210000 cm^2 A_min = 0.016 m^2 Step 4: Calculate the greatest possible pressure. Pressure is calculated using the formula P = (F)/(A). P = 50 N0.016 m^2 P = 3125 N m^-2 P = 3125 Pa The greatest possible pressure the block will exert on the ground is 3125 Pa. Send me the next one 📸