note this newer classification
Grant Schiller's List: Junior Science
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Term Definition Saturated No more solute can be dissolved in the solvent Concentrated A solution with lots of solute dissolved in it Dilute A solution with only a little solute dissolved in it Soluble Able to dissolve Insoluble Not able to dissolve Solvent A liquid or gas that can dissolve another substance Residue The material left behind when filtering Filtrate The material that passes through a filter Solution A mixture of solute and solvent Heterogeneous mixture All substances in a mixture can be seen Homogenous mixture Not all substances can be seen e.g. a solution Evaporation The change in state from a liquid into a gas Crystallisation The separation of a solute from a solvent by evaporation Condensation The change of state from gas to liquid Distillation A separation technique that uses evaporation and condensation Filtration Using a filter to separate a solid from a liquid or gas Decanting A separation method that involves pouring off the liquid Sieve A coarse filter Colander A type of sieve used for separating foods Suspension Small particles held in a liquid Sediment Particles that have settled to the bottom of a mixture Centrifuging A method of separation that uses spinning to separate substances of different density Paper chromotography Separating colours using paper Distillate The product of distillation Dissolve To create a solution by mixing a solvent with a solute Flocculation A separation technique that involves adding a chemical to a mixture so that small particles clump together, making them easier to remove
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marking the acceptance of this group within the Monera.[2]
In 1969, Robert Whittaker published a proposed five kingdom system for classification of living organisms.[4] Whittaker's system placed most single celled organisms into either the prokaryotic Monera or the eukaryotic Protista. The other three kingdoms in his system were the eukaryotic Fungi, Animalia, and Plantae. Whittaker, however, did not believe that all his kingdoms were monophyletic.[2]
In 1977, a PNAS paper by Carl Woese and George Fox demonstrated that the archaea (initially called archaebacteria) are not significantly closer in relationship to the bacteria than they are to eukaryotes. The paper received front-page coverage in The New York Times and great controversy initially, but the conclusions have since become accepted, leading to replacement of the kingdom Monera with the two kingdoms Bacteria and Archaea.[2] However, Thomas Cavalier-Smith has never accepted the importance of the division between these two groups, and has published classifications in which the archaebacteria are part of a subkingdom of the Kingdom Bacteria.[5]
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Mar 08, 11
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Web links for Junior Science yr 8
Updated on Feb 24, 12
Created on Mar 18, 10
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