IGCSE Sciences - Co-Ordinated (0973) — May–June 2025, Paper 41
12 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Carbon dioxide is taken in for the process of photosynthesis. State the balanced symbol equation for photosynthesis.
Answer this question and get it marked →Fig. 2.1 is a diagram of the human heart and the blood vessels that connect with it. Describe two differences between the pulmonary artery and the vena cava.
Answer this question and get it marked →Fig. 3.1 is a magnified image of a plant root tip viewed using a light microscope. At X in Fig. 3.1, there are 37 cells across the width of the root tip. The actual width of the…
Answer this question and get it marked →Tropical forests are some of the most important ecosystems in the world. Fig. 4.1 is a food chain from a tropical forest: banana tree - grasshopper - frog - python The banana tree…
Answer this question and get it marked →Water exists in the solid, liquid or gas state. The particles are arranged differently in each physical state. Name the state where the water particles are furthest apart.
Answer this question and get it marked →A sodium atom is represented with numbers next to its chemical symbol, as shown in Fig. 6.1: mass number 23 (top left) and atomic number 11 (bottom left) next to the symbol Na.…
Answer this question and get it marked →The metal iron is extracted from hematite in a blast furnace. The extraction happens in several stages. In the first stage, carbon (coke) is burnt to provide heat and produce…
Answer this question and get it marked →Petroleum is separated into useful fractions by fractional distillation. Fig. 8.1 shows the fractions obtained from a fractionating column, with petroleum fed in near the bottom.…
Answer this question and get it marked →The Sun is the star in our Solar System. State the two most common elements found in the Sun.
Answer this question and get it marked →A rocket travels vertically upwards. Fig. 10.1 shows the speed-time graph for the rocket: speed / m/s (y-axis, 0 to 350) against time / s (x-axis, 0 to 50). The curve rises with…
Answer this question and get it marked →Describe one similarity and two differences between boiling and evaporation. similarity ......................................... difference 1…
Answer this question and get it marked →Fig. 12.1 shows a 10 ohm resistor and a resistor R of unknown resistance connected in parallel with a 1.8 V cell. R is on one branch and the 10 ohm resistor is on a parallel…
Answer this question and get it marked →