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science 1
| Question | Answer |
|---|---|
| what does photosynthesis mean? | the process of a plant growing |
| what does pigment mean? | the natural coulorization of leaves |
| what does chlorophyll mean? | chlorophyll is the green pigment in leaves |
| what does carotenoids mean? | carotenoids are orange pigments in leaves |
| what does xanthophyll mean? | xanthophyll is the yellow or brown pigment in leaves |
| how can the different pigments in leaves be revealed? | leaf chromatography |
| what is dissolving? | dissolving is when a solute is fully incorporated in a solvent |
| what are the different states that can exist in a solution? | a solid, liquid, gas or a combination. |
| what is the difference between a solute and a solvent? | a solute is the substance that dissolves a solvent dissolves the solute to form a solution |
| why is water called the universal solvent? | it is called that because it dissolves more different solutes than any other solvent |
| identify the examples of solutes and solvents in these common substances: steel,brass,air,apple juice,ocean,pop and vinegar | steel=oxygen, carbon=iron brass=zinc=copper air=oxygen,argon,carbon dioxide=nitrogen gas apple juice=sugar, minerals=water ocean=different salts=water pop= solid sugar, carbon dioxide, gas= water vinegar=liquid, acidic acid=water |
| what happens when sugar dissolves in water? explain using the particle theory. | what happens is when the sugar particles dissolve the particles mix with the water particles. the sugar particles are bigger so the water particles fit in the empty spaces between them, the particle theory says particles have empt spaces between them |
| why is the total volume of sugar and water often somewhat less then the volume of the separate components of sugar and water? | water and sugar particles are attracted to each other. they move closer together when mixed which takes up less space. |
| what does the term insoluble and soluble mean? | insoluble means it's unable to dissolve in a specified solvent soluble means it's able to dissolve in a specified solvent |
| does sugar dissolve equally well in all solvents? | no. sugar is soluble in water but insoluble in vegetable oil |
| what is the difference between concentrated and dilute solutions? | concentrated solutions has a large amount of solute in a volume of solution. dilute solutions has a small amount of solute in a volume of solution. |
| what are 2 different methods for separating mechanical mixtures or solutions? | sorting=physically seperating large pieces of a MM so that similar pieces are together=seperating legos or notes or recycling floating=a lighter component rises to the top of a liquid where it can be poured or skimmed off=skimming chicken fat |
| what are 2 different methods for separating mechanical mixtures or solutions? | settiling=a heavier component sinks to the bottom of a liquid, can be poured off=panning for gold, treating water at a sewage plant, using a centrifuge. paper chromatography=used to separate and identify different chemicals in ink=used in food industry |
| what are 2 different methods for separating mechanical mixtures or solutions? | distillation=process of separating liquids in a solution by heating it,trapping,cooling the gas,collecting the resulting pure liquid=used in fractional distillation to purify crude oil into useable products |
Created by:
allison13
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