Multiple ChoiceWhich of the following best describes the difference between a chemical change and a physical change?25views
Multiple ChoiceWhich of the following pairs shows one example of a physical change and one example of a chemical change?21views
Multiple ChoiceWhen a copper coin changes color from copper to silver after being placed in a solution, is this an example of a physical change or a chemical change?30views
Multiple ChoiceA student mixes vinegar (acetic acid) with baking soda (sodium bicarbonate), observes bubbling, then heats the resulting solution until a white solid forms. How many chemical changes occurred in this scenario?39views
Multiple ChoiceWhen water changes from a solid to a liquid or from a liquid to a gas, what happens to its chemical structure?39views
Multiple ChoiceWhich of the following is a chemical change involved in the formation of soils?22views