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Mix & Flow of Matter

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
Agitation   stirring or shaking (19)  
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Archimedes’ Principle   a scientific principle stating that the buoyant force acting on a submerged object equals the weight (force of gravity) of the fluid displaced by the object (65)  
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Area   the amount of surface; measured in square units such as cm2 (304)  
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Average Density   the total mass of an object divided by the total volume (62)  
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Bar Graph   a diagram consisting of horizontal or vertical bars that represent (often numerical) data  
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Barometer   the most common device for measuring air pressure (76)  
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Buoyancy   the tendency to rise or float in a fluid (59)  
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Buoyant Force   the upward force exerted on objects submerged in or floating on a fluid (59)  
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Capacity   the largest amount that can be held by a container (usually measured in litres or millilitres)  
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Capacity Unit   unit used to measure the volume of liquids, e.g., the litre (L)  
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Change of State   the transformation of a substance’s physical state (whether solid, liquid, or gas) into another state  
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Circle Graph   a circle divided into sections (like pieces of a pie) to represent data; also called a pie chart  
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Classify   to group ideas, information, or objects based on their similarities  
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Colloid   a heterogeneous mixture in which particles do not settle (15)  
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Compressibility   the ability to be squeezed into a smaller volume; a property of gases  
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Compressible   capable of being squeezed into a smaller volume  
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Compressor   an electrical device that compresses air (82)  
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Conclusion   an explanation of the results of an experiment as it applies to the hypothesis being tested  
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Condensation   the process of changing from gas to liquid  
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Control   in a scientific experiment, a standard to which the results are compared; often necessary in order to draw a valid conclusion; ensures a fair test  
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Co-ordinate Graph   a grid that has data points named as ordered pairs of numbers, (e.g., (4, 3))  
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Cubic Units   the units used to report the volume of a substance (e.g., cm3)  
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Decompress   to release from pressure  
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Dehydration   the process of removing water from the solution  
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Density   the amount of mass in a certain unit volume of a substance (density equals mass divided by volume) (50)  
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Desalination   removal of dissolved salts from a solution  
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Desalination Plant   the buildings and machinery used in producing fresh water by removing salts from seawater  
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Displace   to move something out of the way (e.g., a solid object can displace water out of a container)  
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Dissolved Solids   salts, such as sodium, calcium, and magnesium found dissolved in water (449)  
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Dissolving   breaking up; forming a solution by mixing two or more materials together (17)  
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Distillation   a method of separating the parts of a liquid mixture  
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Emulsion   a mixture in which droplets of fat are prevented from joining together by an emulsifying agent (15)  
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Evaporation   vaporization that occurs slowly over a wide range of temperatures  
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Experiment   an activity or procedure designed to test a hypothesis  
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Exponent   in science or mathematics, a number, or power, that tells you how many times the number is multiplied by itself; e.g. 103 means 10 × 10 × 10 or 1000  
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Fair Test   an investigation (experiment) carried out under strictly controlled conditions to ensure accuracy and reliability of results. In a fair test, all variables are controlled except the one variable under investigation.  
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Feedback   the return of information from the output of a system to the input  
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Filtrate   the solution which passes through a filter paper or through a filtration device  
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Floating   remaining suspended in a fluid; for example, not falling in air or sinking in water (59)  
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Flow   pressure pressure that is caused by a moving fluid  
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Flow Rate   the volume of fluid that passes a point in a pipe or tube in a certain amount of time (40)  
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Fluid   any substance that flows; includes liquids and gases (2)  
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Fluidity   the ability to flow (2)  
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Force   a push or a pull, or anything that causes a change in the motion of an object (53, 304)  
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Fractional Distillation   a process that yields different petroleum products by separating parts of a solution  
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Freezing   the process of changing from liquid to solid  
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Freezing Point   the temperature at which a liquid freezes  
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Gas   the state of matter in which a substance has neither a definite shape nor a definite volume (e.g., water vapour) (7)  
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Graphic Organizer   a visual learning tool that helps clarify the relationship between a central concept and related ideas or terms  
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Gravity   the attractive force between masses; causes objects to be attracted to Earth (53)  
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Heterogeneous   made up of parts, or mixed (15)  
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Histogram   a type of bar graph in which each bar represents a range of values and in which the data are continuous  
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Homogeneous   the same in structure, quality, or kind (14)  
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Hydrometer   an instrument designed to measure the density of a liquid (67)  
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Hypothesis   a testable proposal used to explain an observation or to predict the outcome of an experiment; often expressed in the form of an “If …, then …” statement.  
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Impermeable   allowing no materials to pass through (128, 403)  
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Incompressible   incapable of being squeezed into a smaller volume (73)  
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Infer   to conclude or decide by reasoning  
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Inference   a conclusion or opinion formed by inferring  
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Insoluble   not able to be dissolved in a particular solvent (24)  
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Joule (J)   a unit used to measure energy or work; 1 J  
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Kilopascal (Kpa)   a unit of pressure equal to 1000 pascals (71)  
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Line Graph   a diagram that shows how one value depends on or changes according to another value; produced by drawing a line that connects data points plotted in relation to a y-axis (vertical axis) and an x-axis (horizontal axis)  
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Liquid   the state of matter in which a substance has a definite volume, but no definite shape (e.g., water) (7)  
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Manipulated Variable   in an experiment, a factor that is selected or adjusted to see what effect the change will have on the responding variable  
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Mass   the amount of matter in a substance; often measured with a balance (53)  
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Mechanical Mixture   mixtures that are obviously heterogeneous (15)  
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Melting   the process of changing from solid to liquid  
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Melting Point   the temperature at which a solid changes to a liquid  
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Mixture   a combination of two or more pure substances such as that each one’s properties are not lost, but may be hidden (13)  
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Neutral Buoyancy   the condition in which the amount of force pulling down on an object immersed in a fluid (i.e., gravity) equals the amount of force pushing up (buoyancy) (65)  
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Particle Model of Matter   a scientific model of the structure of matter; one part of this theory states that all matter is made up of extremely small particles  
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Pascal (Pa)   a unit for pressure; newtons per square metre (N/m2) (71)  
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Pascal’s Law   a law stating that when pressure is exerted on one part of a fluid, the same pressure is transmitted unchanged to all parts of the fluid, no matter what the shape of the container holding the fluid (307)  
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Phases   separate parts of a mechanical mixture (15)  
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Pneumatic System   a system in which a gas, such as air, transmits a force exerted on the gas in an enclosed space (82, 313)  
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Pneumatics   the study of pressure in gases  
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Properties   characteristics that describe matter (13)  
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Pure Substance   a material that contains only one kind of particle  
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Rate of Dissolving   how fast a solute dissolves in a solvent  
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Saturated Solution   a solution in which no more solute will dissolve in a specific amount of solvent at a specific temperature (20)  
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Solid   the state of matter in which a substance has a definite shape and a definite volume (e.g., ice) (7)  
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Soluble   able to be dissolved in a particular solvent (18)  
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Solubility   the mass of a solute that can dissolve in a given amount of solvent to form a saturated solution at a given temperature (200)  
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Solute   a substance that dissolves in a solvent (e.g., salt is a solute that dissolves in water) (18)  
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Solution   a homogeneous mixture of two or more pure substances (14)  
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Solvent   a substance that dissolves a solute to form a solution (e.g., water is a solvent that dissolves salt) (18)  
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Sublimation   the process of changing from solid to gas without going through the liquid state  
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Supersaturated Solution   a solution that contains more solute than would normally dissolve at a certain temperature (21)  
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Suspension   a heterogeneous mixture in which particles settle slowly after mixing (15)  
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Table   an orderly arrangement of facts or numerical data set out for easy reference; for example, an arrangement of numerical values in vertical or horizontal columns  
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Temperature   a measure of the thermal energy of the particles in a substance  
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Theory   an explanation of an event that has been supported by consistent, repeated experimental results and has therefore been accepted by a majority of scientists  
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Unsaturated Solution   a solution in which more of the solute could  
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Dissolve   in a specific amount of solvent at the same temperature (20)  
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Vaporization   the process of changing from liquid to gas  
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Variable   a factor that can influence the outcome of an experiment  
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Viscosity   the measure of how fast a fluid will flow; the “thickness” or “thinness” of a fluid (40)  
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Volume   the measurement of the amount of space occupied by a substance; measured in litres or cubic units such as cubic centimetres (cm3) (53)  
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Weight   the force of gravity exerted on a mass (53)  
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Whmis   an acronym that stands for Workplace Hazardous Materials Information System  
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Work   the transfer of energy through motion  
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