WASSCE 2026 Integrated Science Section B (Confirmed Standard) Question 1 i. Define diffusion. (2 marks) ii. State two factors affecting diffusion. (2 marks) i. Explain osmosis. (2 marks) ii. Describe an experiment to demonstrate osmosis. (4 marks) State four differences between plant and animal cells. (4 marks) Explain two importance of diffusion in living organisms. (4 marks) Question 2 i. Define acid. (1 mark) ii. Define alkali. (1 mark) i. State three properties of acids. (3 marks) ii. State two uses of bases. (2 marks) i. Explain neutralization reaction. (2 marks) ii. Write a balanced equation for: HCl + NaOH → ? (2 marks) Explain two methods of preparing salts. (4 marks) Question 3 i. Define work done. (2 marks) ii. State the formula for work done. (1 mark) i. Define power. (2 marks) ii. State its SI unit. (1 mark) i. State the law of conservation of energy. (2 marks) ii. Describe two examples of energy transformation. (4 marks) Explain two advantages and one disadvantage of friction. (4 marks) Question 4 i. Define soil erosion. (2 marks) ii. State three causes of soil erosion. (3 marks) i. Explain crop rotation. (2 marks) ii. State three importance of crop rotation. (3 marks) Describe two methods of controlling soil erosion. (4 marks) Explain two effects of deforestation. (4 marks) Question 5 i. Define respiration. (2 marks) ii. Differentiate between aerobic and anaerobic respiration. (4 marks) i. State three functions of blood. (3 marks) ii. Name two components of blood. (2 marks) Explain two diseases of the circulatory system. (4 marks) State three ways of maintaining a healthy lifestyle. (3 marks) Question 6 i. Define electric current. (2 marks) ii. State its unit. (1 mark) i. State Ohm’s Law. (2 marks) ii. Write its formula. (1 mark) i. Draw a simple electric circuit. (3 marks) ii. State two differences between series and parallel circuits. (4 marks) Explain two uses of light in everyday life. (4 marks) https://whatsapp.com/channel/0029VbBkvLqAojYnxRhM2O0R Forward to your friends and groups

Morning Prince — let's get this done. Question 1 a) i. Diffusion is the net movement of particles from a region of higher concentration to a region of lower concentration, down a concentration gradient. ii. Two factors affecting diffusion are: • Temperature • Surface area b) i. Osmosis is the net movement of water molecules from a region of higher water potential (lower solute concentration) to a region of lower water potential (higher solute concentration) across a partially permeable membrane. ii. An experiment to demonstrate osmosis can be described as follows: 1. Peel a potato and scoop out a hollow in its center, leaving a thin base. 2. Place the potato in a beaker containing water. 3. Fill the hollow in the potato with a concentrated sugar solution and mark the initial level of the solution. 4. Leave the setup for a few hours. 5. Observe that the level of the sugar solution in the potato hollow rises, indicating that water has moved from the beaker (higher water potential) into the potato hollow (lower water potential) through the partially permeable potato cells. c) Four differences between plant and animal cells are: • Plant cells have a rigid cell wall, while animal cells do not. • Plant cells typically have a large, central vacuole, whereas animal cells have small, temporary vacuoles or none. • Plant cells contain chloroplasts for photosynthesis, while animal cells do not. • Plant cells have a fixed, regular shape, while animal cells have an irregular shape. d) Two importances of diffusion in living organisms are: • Gas exchange: Diffusion allows oxygen to move from the lungs into the blood and carbon dioxide to move from the blood into the lungs for exhalation. It also facilitates the uptake of carbon dioxide by plants for photosynthesis and the release of oxygen. • Nutrient absorption: Digested food molecules, such as glucose and amino acids, are absorbed from the small intestine into the bloodstream through diffusion. Send me the next one 📸