unit test review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is matter? | Anything that takes up space and has mass.
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| What are properties of matter? | They describe the characteristics of matter.
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| What are some properties you can use to describe matter? | colour, odour,taste, feel, density, boiling point, freezing point, state
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| What are some properties of water? | colourless, tasteless, can be a solid, liquid or gas, boils at 100 degrees and freexes at 0degrees.
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| Homogeneous matter | 1 set of properties - it looks the same throughout.
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| Heterogeneous matter | more than one set of properties - you can see the different parts in it.
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| pure substance | All of the particles look the same. It cannot be separated into different substances.
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| Mechanical Mixture | Same as heterogeneous matter. You can see the different parts that were added together.
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| Homogeneous Mixture | A mixture that has only 1 set of properties. It all looks like one thing. The same as a solution.
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| Solution | A homogeneous mixture. It's mixted together so well you can only see one set of properties.
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| What are the two parts of any solution? | Solute and Solvent
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| Solute | gets dissolved to form a solution - the part with the least amount
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| Solvent | does the dissolving the form a solution - the part in the greater amount.
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| dissolving | making a solution by mixing two or more substances.
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| What determines if something will dissolve? | The attraction between the solute and solvent particles.
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| Concentration | The amount of solute dissolved in the solvent - measured in grams per litre g/L
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| Concentrated | Lots of solute dissolved in the solvent.
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| Dilute | Relatively little solute dissolved in the solvent.
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| Unsaturated solution | more solute can dissolve because there are free solvent particles
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| Saturated | no more solute will dissolve at the same temperature because all of the solvent particles are full
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| Hydrometer | Measures the concentration of solutions.
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| How does a hydrometer work? | It floats higher in concentrated solutions and lower in dilute solutions.
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| Is the Dead Sea concentrated or dilute? | So concentrated that you can't sink.
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| What four things can affect the rate of dissolving? | Stirring, Crushing, Temperature and Pressure
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| Will a hydrometer float high or low in a dilute solution? | low
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| What are the three states of matter? | Solid, liquid and gas
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| Why won't a rock dissolve in water? | Because its particles are not attracted to the water particles.
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| Soluble | means it will dissolve
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| Insoluble | means it won't disslove
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| In evaporation, what do we get back from the mixture...the solute or the solvent | the solute
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| In distillation, what do we get back from the mixture...the solute or the solvent | the solvent
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| How would you distill water and purify it | boil and evaporate the water, collect the steam, cool it until it condenses back into a liquid
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