Cambridge Progression Test Stage 7 Science 2024 Paper 2

1. Classification and keys: definition of species, completion and interpretation of dichotomous key for tree leaves (eucalyptus, beech, yew, alder)
2. Physical properties: comparison of metals and non-metals (electrical/thermal conductivity, melting point, density)
3. Gravity: fair test identification, correcting force data error using mass-distance relationship, gravity defined as force of attraction
4. Astronomy: Moon position during solar eclipse recognition (diagram-based)
5. Food webs: herbivore identification (small fish), completion of food web including penguins and whales, decomposer function in nutrient cycling
6. Chemical reaction: reaction between calcium carbonate and hydrochloric acid (CO₂ bubbles, pH change), identifying evidence of reaction and acid neutralisation