5.4 practical: investigate density Carefully place syrup, then using direct measurements of mass water and then oil into a tall and volume. cylinder. The oil floats on the water, which floats on the syrup. By lowering different materials into the cylinder, their densities can be compared to the different liquids. Executive function Critical thinking 37 Section 5: Solids, Students should: Activities: Edexcel International GCSE Adaptability Problem solving liquids and Physics: 164-168 and 178 Complete example including Interpretation b) Density and calculations. Gas pressure: ActiveBook Page 5.5 know and use the relationship Executive function pressure 173, animation between pressure, force and area: Discuss cases where large/small area affects Particles in a gas: Page 174, pressure = force / area pressure, e.g. carrying a animation p = F / A carrier bag, carrying a parcel by string, 5.6 understand that the pressure at a nails/drawing pins being point in a gas or liquid which is at pushed into walls, using rest acts equally in all directions Questions in Edexcel International snow shoes, using large GCSE Physics Revision Guide: tyres on tractors, and why Pages 69 to 72 and Pages 100 to damage to a wooden floor 5.7 know and use the relationship for 101 can be greater from stiletto pressure difference: heels than from an elephant. pressure difference = height × Discuss the use of a Video clips: density × gravitational field strength mercury barometer and how (a) p = h × × g ρ much taller it would be if (b) water were used instead of (c) mercury. (d) Calculate thickness of (e) atmosphere. (f)
5.4 practical: investigate density using direct measurements of mass and volume. Carefully place syrup, then water and then oil into a tall cylinder. The oil floats on the water, which floats on the syrup. By lowering different materials into the cylinder, their densities can be compared to the different liquids. 37 Section 5: Solids, liquids and b) Density and pressure Students should: 5.5 know and use the relationship between pressure, force and area: pressure = force / area p = F / A 5.6 understand that the pressure at a point in a gas or liquid which is at rest acts equally in all directions 5.7 know and use the relationship for pressure difference: pressure difference = height × density × gravitational field strength p = h × ρ × g Activities: Complete example including calculations. Discuss cases where large/small area affects pressure, e.g. carrying a carrier bag, carrying a parcel by string, nails/drawing pins being pushed into walls, using snow shoes, using large tyres on tractors, and why damage to a wooden floor can be greater from stiletto heels than from an elephant. Discuss the use of a mercury barometer and how much taller it would be if water were used instead of mercury. Calculate thickness of atmosphere. Edexcel International GCSE Physics: 164-168 and 178 Gas pressure: ActiveBook Page 173, animation Particles in a gas: Page 174, animation Questions in Edexcel International GCSE Physics Revision Guide: Pages 69 to 72 and Pages 100 to 101 Video clips: (a) (b) (c) (d) (e) (f) Executive function Adaptability Critical thinking Problem solving Interpretation Executive function