Topic P1: Flash Questions 0.0 / 5 ? PhysicsMatterGCSEOCR Created by: MiriamLCreated on: 09-10-19 17:16 What does the Bohr model of the Atom look like? Mass is concentrated in a positively charged nucleus that is orbited by negative electrons in fixed shells. 1 of 37 What was Daltons model of the atom? Solid spheres 2 of 37 What was J J Thomson’s model of the atom? Plum pudding. Positive mass with electrons dotted inside 3 of 37 What was Rutherfords model of the atom? Nucleus. Positively charged nucleus. Cloud of negative electrons. 4 of 37 When did the Gold Foil Experiment take place? 1909 5 of 37 What were the names of Rutherfords helpers? Geiger and Marsden 6 of 37 What would happen if the plum pudding model was correct? The particles would pass straight through with very few deflected 7 of 37 What happened instead? More than they thought were deflected, and deflected the way they came. 8 of 37 What did the results of the experiment mean? The atoms weren’t solid 9 of 37 How big are atoms? 1*10^-10 10 of 37 Why was Bohr’s model accepted by scientists? They could reproduce the evidence 11 of 37 What causes change of state? Increasing kinetic energy in particles 12 of 37 How do you calculate the density of an object? Measure the mass of the object using a balance and calculate the volume using a eureka can 13 of 37 Does density change when a substance changes state? Yes, the particles move apart so the volume increases, and the density decreases and vice versa. 14 of 37 What happens when you heat a solid? The particles gain kinetic energy. 15 of 37 What does kinetic energy do to solid particles? It causes them to vibrate faster and move further apart 16 of 37 What does the cause the solid to do? Expand a bit. 17 of 37 When it reaches its melting point what does the heat energy given to a solid do? It is used to break bonds between the particles. 18 of 37 Does the substance change temperature while this happens? No 19 of 37 When will the temperature rise again Once it is melted 20 of 37 Is this the same for boiling? Yes 21 of 37 What is the formula for specific latent heat? SLH=Energy/Mass 22 of 37 What does a change in temperature depend on? How much heat energy it’s given. What the object is made from. The mass of the object. 23 of 37 What is the equation for specific heat capacity? SHC=energy/mass*changeintemp 24 of 37 Why can liquids and gases flow? Because their particles are relative to each other. 25 of 37 How does a movement on particles create pressure? The movement of their particle creates pressure as they collide with the walls of their containers and any objects in them 26 of 37 What does increasing the temperature of a gas do? Makes the particles move faster because of kinetic energy 27 of 37 What does particles moving faster mean? More pressure 28 of 37 What is the equations for a fixed amount of gas at a constant temperature? P*V=Constant 29 of 37 What happens when you decrease the volume of a gas? The pressure increases because the particle have less space to move 30 of 37 How do you calculate the pressure due to a depth of a fluid? pressure=height of fluid*density of fluid*g 31 of 37 What happens when a solid is placed in a liquid? It displaces some of the liquid 32 of 37 What does the pressure in the liquid create? An upthrust force 33 of 37 What does the object do if it is smaller than the upthrust? It floats 34 of 37 What happens if the upthrust is smaller than the object? It sinks 35 of 37 What does the size of the upthrust depend on? The density of the liquid and the volume it displaced 36 of 37 When will an object float? When it has displace its own mass of the liquid 37 of 37
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