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Chemistry, 07.07.2019 04:00 ari8160

50 points! for chemistry. 1.) compare the type of change that occurs when a match is burnt and when a liquid starts boiling. use complete sentences to justify the type of change that occurs. 2.) a glow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion. 3.) read the following passage. the word "atom" was coined by democritus, who, unlike aristotle, believed that matter can be divided only until we get the smallest "indivisible particle." several years later based on macroscopically observable experimental results, dalton proposed that all matter is composed of atoms. many postulates of atomic theory as proposed by dalton were later rejected by jj thompson, who has to his credit the discovery of sub atomic particles like electrons. use information from the passage to justify whether the characteristics of reliable scientific explanations are present in the development of the atomic theory. real answers and explanations only, !

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50 points! for chemistry. 1.) compare the type of change that occurs when a match is burnt and when...

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