# Science Chapter 4

 Force a push or pull that causes movement Flow Rate how quickly a fluid flows in a given amount of time Dynamic a term described systems that involve movement, such as moving fluids Aerodynamics air or gas moving around solid objects Hydrodynamics the motion of liquids (usually water) around solid objects Melting the process of a substance changing from a solid to a liquid Evaporation the process of changing a substance from a liquid to a gas Condensation the process of changing a substance from a gas to a liquid Solidification the process of changing a substance from a liquid to a solid Sublimation the process of changing water directly from a gas to a solidor from a solid to a gas Kinetic Molecular Theory 1. All matter is composed of molecules or other types ofparticles 2. Particles are in constant motion 3. There are forces of attraction among particles Laminar Flow flow in which a fluid travels in straight, or almost straight, lines Turbulent Flow fluid flow characterized by irregular patterns when water isunable to flow in straight lines Drag a force (air or water resistance) that acts to slow a bodymoving through a fluid Streamlined shaped to create laminar flow, has less air or water resistance (drag) Viscosity the resistance of a fluid to flowing and movement Cohesion the attractive forces among the particles of a substance Adhesion the attractive forces between the particles of a fluid andthe particles of another substance Surface Tension the increased attraction among the particles at the surfaceof a liquid Viscometer an instrument that measures viscosity Flow Rate Formula volume of fluid (mL) time (s) Mass the amount of matter in an object Weight measurement of the force of gravity pulling on the object Volume a measure of the amount of space occupied by matter the volume of a rectangular solid FORMULA volume = length x width x height the volume of a small irregular solid FORMULA Volume of object = (volume of water + object) – (volume of water) Density Den. Of saltwater x 100% = .92g/cm3 x 100% 1.03 g/cm2 = 89% Density Den. Ofsaltwater x 100% = .92g/cm3 x 100% 1.03 g/cm2 = 89% Density – g/cm3 Density = mass – g/mL Volume Positive Buoyancy Rise Negative Buoyancy Sink Neutral Buoyancy Stay Buoyancy the upward force that a fluid exerts on an object AuthorAnonymous ID5027 Card SetScience Chapter 4 DescriptionScience Notes Updated2010-01-25T01:29:54Z Show Answers