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Fu's quiz
matter classification; seperation technuiques; identify matters
| Question | Answer |
|---|---|
| Two types of matter | Pure substance and mixture |
| Subcategories of pure substances | Element, and Compound |
| subcategories of mixtures | Homogeneous, heterogeneous |
| Define pure substance | -Composed of only one type of atom or molecule -Looks like you copied and pasted/duplicated one molecule or atom. -Will be one word (meaning no & or +) |
| Define Mixture | -Composed of two or more different types of atoms or molecules in variable proportions -Looks like a blab of multiple different atoms and molecules -Will have an & or + connecting two or more clumps (lmfao ykwim) |
| Define Element | -A pure substance that can not be broken down into simpler substances. -When identifying from an image, it is going to be the one that only has one shape and one capital letter in the formula |
| Define compound | -a pure substance composed of two or more elements in fixed definite proportions. - it is going to be the one 'copy and paste' molecule composed of at least two different shapes or atoms -Will be just one clump and more than one capital letter |
| Define homogeneous | -a substance where all is evenly distributed. -anything like tea, coke, soda, anything dissolved. If every portion is the same no matter where you may test, it should be the same. |
| Define heterogeneous | all molecules and atoms are not evenly distributed. -Chocolate chip cookie, muddy water, tacos. If you can physically take a part out of them it is heterogeneous. I compare it to a taco. If you can take portions out like beef and lettuce its hetero |
| Source for if your struggling (im adding this cuz I really did) homo vs hetero | "How to tell the difference between heterogeneous and homogeneous mixtures" should be like third link ThoughtCo |
| Physical means of separating mixtures | Handpicking, Threshing, Winnowing, Sieving |
| When would you use physical means | Two solids and there are no properties other than appearance and size left to take advantage of. |
| Evaporation | When you have a soluble solid and a liquid. The solid does not have a boiling point so it will not evaporate with the liquid. |
| Distillation | When there are two liquids. Take advantage of the different boiling points and evaporate the one with the lower boiling point and then condense it back to liquid form. bam separated |
| Filtration or Sedimentation | A non-soluble solid and a liquid. Use a sieve or filter to allow the liquid to pass through but the holes are so small that the solid is caught and not allowed to pass. |
| Magnetic Separation | A magnetic solid and a non-magnetic solid. Hover a magnet over the mixture and the magnetic solid will be attracted and removed while the other component stays put. |
| centrifuge | Liquid and liquid or liquid and solid. A quicker alternative to just letting the particles separate themselves over time and the components are actually separated. Spins so fast heavy sink to bottom, light on top. |
| Chromatography | Separate liquid mixtures. Dissolve in a liquid or place liquid on solid. Either dipped in water and travel on its own. Will separate into bands of color (chromatograms). Which are the components of the mixture. |
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I love bagels
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