Topic P1: Definitions 0.0 / 5 ? PhysicsMatterGCSEOCR Created by: MiriamLCreated on: 09-10-19 16:55 Atom Tiny particles of matter that make up everything 1 of 27 The Bohr model Current model of atom. 2 of 27 Gold foil experiment They fired positively charged alpha particles at a very thin sheet of foil. 3 of 27 Solids Vibrate about a fixed position 4 of 27 Liquid In contact but can change position 5 of 27 Gas Moving independently and randomly 6 of 27 Melting Solid to Liquid 7 of 27 Evaporation Liquid to gas 8 of 27 Sublimation Solid to Gas, Gas to solid 9 of 27 Freezing Liquid to solid 10 of 27 Condensing Gas to liquid 11 of 27 Density Property of a material. Mass per unit volume. Density=mass/volume 12 of 27 Eureka Can Measures volume 13 of 27 Kinetic Energy Movement energy 14 of 27 Specific Latent Heat Amount of heat energy required to change the state of 1kg of that substance, without change in temperature 15 of 27 Specific Heat Capacity Changing temperature without changing state. The amount of energy required to raise the temperature of 1kg by 1C 16 of 27 Pressure Force/Area 17 of 27 Fluids Liquids and gases 18 of 27 Temperature Measure of how hot or cold something is 19 of 27 Absolute Zero Lowest temperature that is theoretically possible, equivalent to -273C 20 of 27 Atmosphere The layer of air above the earths surface 21 of 27 Atmospheric pressure Gas pressure caused by the atmosphere due to density of the air at that height, 100kPa at Earths surface 22 of 27 Gas pressure Pressure exerted by a gas due to the collisions of the particles in the gas with the container 23 of 27 Inversely Proportional When one value increases the other decreases at the same ratio 24 of 27 Pascal Unit of pressure 25 of 27 Upthrust Force of an object in a fluid, due to the difference in pressure in the fluid acting on the area of the object 26 of 27 Pressure in fluids Movement of the particles and weight of the fluid. Acts equally in all directions and increases with depth 27 of 27
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