Daily Exam Challenge: Physics (Foundation)
Mark Scheme — 9 marks total
Foundation TierMarking Instructions
- • Accept equivalent answers unless the mark scheme states otherwise.
- • M marks are for method — award even if the final answer is wrong.
- • A marks are for accuracy — only award if the method mark has been earned.
- • B marks are independent and can be awarded without other marks.
- • Where a range of answers is acceptable, this is indicated in the mark scheme.
Describe the structure of a plant cell and name three organelles not found in animal cells.
Acceptable Answer
Plant cells have: cell membrane, cytoplasm, nucleus, mitochondria, ribosomes. Three additional organelles: cell wall (cellulose, provides support), chloroplasts (contain chlorophyll for photosynthesis), permanent vacuole (filled with cell sap, maintains turgor).
Explain why metals are good conductors of electricity.
Acceptable Answer
Metals have delocalised (free) electrons in their structure. When a voltage is applied, these electrons can move through the metal lattice, carrying electric charge and forming a current.
A ball is dropped from a height of 20m. Calculate the speed at which it hits the ground. (g = 10 m/s²)
Acceptable Answer
v² = u² + 2as = 0 + 2 × 10 × 20 = 400. v = √400 = 20 m/s