Cambridge Progression Test Stage 9 Science 2018 Paper 2

1. Biology: mineral absorption and soil pH effect on plant growth, decay organisms improving soil, flower structure and reproduction (pollen, ovary, stigma), sexual reproduction steps (fertilisation, seed formation), predator-prey dynamics, population graph interpretation.
2. Chemistry: Group 1 metal reactivity trends (Li, Na, K, Rb), combustion and hydrogen gas formation, energy-releasing reactions (exothermic), acid-metal reaction products (salt and hydrogen), anomaly identification in reaction data, density investigation and data pattern.
3. Physics: turning force (moment = force × distance), touchscreen charge sequence, electric current and voltage measurement (units, symbols, circuit placement), use of gas syringe for accurate volume, energy transfer by radiation from Sun through space.
4. Environmental science: renewable vs non-renewable resources (e.g. coal), global energy trends and prediction limitations, climate-based data from 2008, naming renewable sources, phosphorus and magnesium soil levels.
5. Scientific methods and history: timeline of atomic models (Democritus to Schrodinger), plum pudding model replacement, importance of evidence in model changes, fair testing (repeatability, accuracy), data anomaly identification and handling.
6. Classification and logic: invertebrate key (earthworm, roundworm, crayfish), atomic particle identification (proton), flower anatomy labeling, logical sequencing in touchscreen technology and energy flow processes.