CONFIRMED WASSCE 2026 INTEGRATED SCIENCE PAPER 2 - ESSAY Time Allowed: 2 Hour 30 Minutes Answer four…

Question

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

ScanSolve AI Tutor · Accepted Answer

Here's the solution for question 2(a)(ii):

Calculate the force (weight) of the concrete block.
The force exerted by the block is its weight, which is given by the formula $F = mg$ .
$F = 5 \text{ kg} \times 10 \text{ m s}^{-2}$ $F = 50 \text{ N}$
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.
$A_{\text{min}} = 8 \text{ cm} \times 20 \text{ cm}$ $A_{\text{min}} = 160 \text{ cm}^2$
Convert the smallest area to square meters.
Since 1 m = 100 cm, then 1 m² = (100 cm)² = 10000 cm².
$A_{\text{min}} = 160 \text{ cm}^2 \times \frac{1 \text{ m}^2}{10000 \text{ cm}^2}$ $A_{\text{min}} = 0.016 \text{ m}^2$
Calculate the greatest possible pressure.
Pressure is calculated using the formula $P = \frac{F}{A}$ .
$P = \frac{50 \text{ N}}{0.016 \text{ m}^2}$ $P = 3125 \text{ N m}^{-2}$ $P = 3125 \text{ Pa}$
The greatest possible pressure the block will exert on the ground is $\boxed{\text{3125 Pa}}$ .

Step-by-step solution

Calculate the force (weight) of the concrete block.

Determine the smallest area.

Convert the smallest area to square meters.

Calculate the greatest possible pressure.

Still stuck on this one?

More Law Questions