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Science U1
Question | Answer |
---|---|
pure substances | an element or compound |
mechanical mixture | two or more substances where you can easily see the two different substances |
solution | one substance (solute) is completely dissolved in another (solvent) and you cannot see the diffrence |
solute | a substance (g) that can dissolve in a solvent |
solvent | a substance (usually a liquid in ml) that a solute can dissolve into |
concentration | the quantity of a solute in a solvent |
solubility | how well a substance dissolves into solvent |
viscosity | a fluids internal resistance or friction that keeps it from flowing |
density | the amount of mass in a given volume |
pressure | the amount of force exerted on a certain area |
hydraulic system | a system that uses a liquid as an enclosed fluid |
pneumatic system | a system that uses a gas as an enclosed fluid |
Pascal's law | an enclosed fluid exerts pressure in all directions |
unit of pressure | Pascals (P) |
1 Pascal = | 1 Newton of pressure exerted on one square meter |
saturation | the point at which a solvent cannot dissolve anymore solute |
matter | can be divided into pure substances and mixturess |
two types of mixtures are | mechanical mixtures and solutions |
calculating concentration | grams per milliliter (g/ml) |
compressable | a trait of a substance at which its particles can be pushed together |
incompressable | a trait of a substance at which its particles are physically unable to be compressed together |
compound | combination of two or more elements (ex. oxygen mixed with hydrogen makes water) |
water, sugar, ammonia are examples of | examples of pure substances |
homogeneous mixture | two or more of the same substance mixed together together so that they cannot be separated or seen |
heterogeneous mixture | two or more of a different substances mixed that can be easily seen and can be separated with a filter |
evaporation is a way of seperating | a solute from a solvent by using heat |
distillation is a method of | separating a solution of two different liquids depending on their boiling point |
unit of force | Newton (N) |
unit of area | meter squared |
buoyancy | an upward force that is the opposite to gravity |
insoluble | when a solute cannot dissolve into a solvent |
temperature | the rate (speed) at which a solute dissolves into a solvent |