BECE 2026 Integrated Science Section B Practice (For Candidates) INSTRUCTION Answer any THREE questions from this section. All questions carry equal marks. 🧪 Question 1: Machines & Energy a) i. What is a simple machine? ii. State two examples of simple machines. b) i. Differentiate between potential energy and kinetic energy. ii. Give one example of each. c) Explain two ways by which friction is useful in everyday life. 🌱 Question 2: Human Biology & Health a) i. What is digestion? ii. Name two organs involved in digestion. b) State three functions of nutrients in the human body. c) i. What is a deficiency disease? ii. Name one deficiency disease and its cause. ⚡ Question 3: Electricity & Forces a) i. What is electric current? ii. State the unit of electric current. b) A resistor of 50 Ω has a potential difference of 200 V across it. Calculate the current flowing through it. c) State two safety precautions when using electricity at home. 🌍 Question 4: Environment & Ecosystem a) i. What is an ecosystem? ii. State two components of an ecosystem. b) Draw and label a simple food chain using: Grass, Goat, Human, Sun c) State three human activities that destroy the environment and explain one. 🧬 Question 5: Matter & Chemistry a) i. Define an atom. ii. Name the three subatomic particles. b) Differentiate between: Physical change Chemical change c) State two properties of acids and two uses of acids. Question 6: Water & Air a) i. What is water pollution? ii. State two causes of water pollution. b) State three methods of conserving water bodies. c) Explain two importance of air to living organisms.

Here is the solution to Question 3: Question 3: Electricity & Forces a) i. Electric current is the rate of flow of electric charge through a conductor. ii. The unit of electric current is the Ampere (A). b) Calculate the current flowing through the resistor. Step 1: Identify the given values. Resistance, R = 50 \, Potential difference, V = 200 \, V Step 2: Apply Ohm's Law. Ohm's Law states that V = IR, where I is the current. To find the current, we rearrange the formula: I = (V)/(R) Step 3: Substitute the values and calculate. I = 200 \, V50 \, I = 4 \, A The current flowing through the resistor is 4 A. c) Two safety precautions when using electricity at home are: • Avoid touching electrical appliances with wet hands to prevent electric shock. • Do not overload electrical sockets with too many appliances, as this can cause overheating and fires. That's 2 down. 3 left today — send the next one.