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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 |