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Mix & Flow Questions
| Question | Answer |
|---|---|
| There was a clear substance in a measuring cup. A student poured the substance out of the cup onto the table forming a pile. The substance was not a fluid because | It did not keep flowing until it was completely spread out |
| Fusion occurs when a substance changes from | A solid to a liquid |
| Salad, gravel and soil are not examples of a/an | Colloid |
| Mayonnaise, ketchup and fog are examples of a/an | Colloid |
| Bob was adding salt to water stirring until it dissolved. He added 10 ml and kept adding until no more would dissolve. This is an example of a/an | Saturated solution |
| In a saturated solution to have more of the solute dissolve you would need to | Heat the solvent |
| There was a mixture containing salt and water. The solute is the | Salt |
| a cup containing water and dissolved salt is a | Solution |
| In a cup of water and dissolved salt the water is the | Solvent |
| Why can you not clean a grease covered frying pan with just water? | Grease is insoluble in water |
| What would be least suitable method for separating a mixture of sand and water? | Settling and decanting |
| What is the relationship between viscosity in liquids and flow rate? | The higher the viscosity, the lower the flow rate. |
| The relationship between viscosity in liquids and flow rate is not described as | The lower the viscosity the higher the flow rate |
| The relationship between viscosity in liquids and flow rate is not described as | The higher the viscosity, the higher the flow rate. |
| The relationship between viscosity in liquids and flow rate is not described as | The lower the viscosity, the lower the flow rate. |
| The relationship between the viscosity of gases and temperature can be described as | As temperature rises, viscosity increases. |
| The relationship between the viscosity of gases and temperature is NOT described as | As temperature rises, viscosity decreases. |
| The relationship between the viscosity of gases and temperature is NOT described as | As temperature rises, viscosity increases then decreases. |
| The relationship between the viscosity of gases and temperature is NOT described as | Temperature has no effect on viscosity. |
| The main reason that a piece of wood floats on water is | Wood is generally less dense than water |
| Buoyant force is not | the amount of mass a substance has when it floats on a fluid. |
| Buoyant force is not | the density of an object floating on a fluid. |
| Buoyant force is not | the difference between the density of the object floating on a fluid and |
| the density of the fluid. | |
| Buoyant force is | the upward force exerted on an object’s submerged in a fluid. A ship made of steel that has been fully loaded with cargo will not sink in water if |
| The relationship between buoyancy and density is best described as | The greater the density of a substance the less is its buoyant force. |
| The relationship between buoyancy and density is not described as | The greater the density of a substance the less is its buoyant force. |
| A hydrometer is not used to measure the density of | Solids |
| A hydrometer is used to measure the density of | liquids |
| The main reason that gases can be compressed is that | The spaces between the particles are very large |
| The reason that liquids and solids are incompressible is that | There is very little space between the particles |
| When an external force is applied to a liquid | The force is transmitted form one particle to the next throughout the substance |
| You can hit a balloon filled with air with a great deal of force and not hurt yourself because the | Compressed air cushions the shock |
| As you climb up Mt. Everest the atmospheric pressure decreases because | The atmosphere is less dense as you gain altitude. |
| Barometers are used to measure | Air pressure |
| A balloon is connected to the top of an empty water bottle. If you squeeze the bottle the balloon will | Inflate a small amount |
| An instrument is made up of a small piston and a large piston. The input force would be on the | The piston with the smallest area |
| Pressure is measured in | Pascals |
| In the formula P | F/A, Force is measured in |
| Pneumatic systems are similar to hydraulic systems except | Gases are used instead of liquids |
| The operation of pneumatic systems is based on the fact that gases can be | Compressed |
| In pneumatic systems gases move from areas of higher pressure to | Areas of lower pressure |
| Pneumatic systems are not based on the fact that | Compressed gases weigh less than non-compressed gases |
| A fluid is a | Substance that will flow |
| Liquids and gases | Form fluids at room temperature |
| Solids have a | Definite volume and shape |
| Solids and liquids have a | Definite volume |
| All substances are made up of | Tiny particles |
| All particles in a pure substance are | The same |
| Different pure substances are made up of | Different particles |
| Particles are always in motions moving | From place to place |
| The strength of an attractive force depends on | The type of particle |
| The particles in a solid are | Tightly packed |
| The particles in a gas are | Far apart |
| Sublimation is the change of state from a | Solid to gas or gas to solid |
| Fusion is the change of state from a | Solid to a liquid |
| Vaporization is the change of state from a | Liquid to a gas |
| Condensation is the change of state from a | Gas to a liquid |
| Melting is the change of state from a | Solid to a liquid |
| In fusion heat is added making the particles | Move faster |
| In condensation heat is removed making the particles move | More slowly |
| What method is used to separate petroleum into its components | Fractional distillation |
| The method best used to separate gold from quartzite would be | Filtration |
| Smelting is used to separate some metals from ore. Smelting is different from the way gold is separated because in smelting the mixture is | Heated |
| Distillation is a method of separating a | Solute from its solvent |
| The particle model is a theory that explains what | The properties of liquids, solids and gases. |
| The form of matter that does not have a definite shape or volume is a | Gas |
| Particles that are tightly packed together and only vibrate are | Solids |
| In this form of matter there is a great amount of space between the particles that move quickly | Gas |
| A mixture is a | Combination of two or more substances such that each of the substances retains its properties. |
| A solution is a type of | Homogeneous mixture |
| A mechanical mixture is a | Heterogeneous mixture |
| Water is commonly known as the | Universal solvent |
| The three factors that affect the rate of dissolving are | Agitation, temperature, pressure |
| The relationship between the density and distance between particles is described as | The greater the distance between the particles the less density |
| The relationship between the density and attraction between particles is described as | The greater the attraction between the particles the greater the density |
| The relationship between density and temperature is | The higher the temperature the lower the density |
| Mass is defined as | The amount of matter in a substance |
| Volume is the | Amount of space occupied by a substance |
| Weight is the | Force of gravity exerted on an object |
| To calculate a mass-to-volume ratio you will need to | Divide the mass by the volume |
| Archimedes’ principle is the | The buoyant force acting on an object equals the weight of the fluid displaced by the object. |
| The buoyant force of a liquid depends on its | Density |
| The buoyant force of a liquid with a higher density will be greater than | The buoyant force of a liquid with a lower density |
| Object float more easily on salt water than on fresh water because | The salt water is denser than fresh water |
| Object float less easily in vegetable oil than water because | Vegetable oil is less dense than water so it has less buoyant force. |
| The viscosity of a liquid | Decreases as its temperature increases |
| The less viscous a fluid | The greater the flow rate |
| The viscosity of a gas | Increases as its temperature increases |
| The thicker a liquid | The more viscous it is |
| The higher a fluid’s viscosity the | Lower its flow rate |