Chemical Reactions
Quiz by John Biggs
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17 questions
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- Q1When iodine, cornstarch and water are combined to make a solution , does a physical or chemical change occur?Physical changeChemical change30s
- Q2When Iodine is combined with cornstarch and water, how do we know that a physical or chemical change occurred?Change in state of matterGas ProductionColor changeHeat Production30s
- Q3Is melting ice an example of a physical change or a chemical change?Chemical changePhysical change30s
- Q4What evidence shows that a change occurs when ice melts?Change in state of matterPrecipitate formsColor changeGas forms30s
- Q5Is burning paper in example of a physical or chemical change?Chemical changePhysical change30s
- Q6What evidence shows that a change happens when paper is burned?Precipitate formsGas productionColor changeChange in state of matter30s
- Q7Is freezing water an example of a physical change or a chemical change.Chemical changePhysical change30s
- Q8What evidence shows that a change happens when water freezes?Color changeChange in state of matterGas productionPrecipitate forms30s
- Q9The data in the table can be used as evidence to support the claim that all of these fuels _________.Are made of natural materials.Exist in the same state of matter.Take several days to produce.Are very costly to produce.30s
- Q10The production of which of the listed materials would require growing plants?CeramicPaperNylon fibersGlass30s
- Q11Which of the following is true about the atoms involved in a chemical reaction?The same number of each type of atom will be present before and after a chemical reaction.Some of the atoms will be changed into a different type of atom by a chemical reaction.Some of the atoms present before the reaction will be lost during a chemical reaction.During a chemical reaction, atoms will always be combined into much larger molecules.45s
- Q12Which of the models of chemical reactions correctly shows the Law of Conservation of Matter?CADB30s
- Q13Which of the reactions shows an endothermic reaction?Baking Soda and VinegarIodine and Liquid StarchHydrogen Peroxide30s
- Q14How do you know that Baking Soda and Vinegar created an endothermic reaction?The temperature decreasedThe temperature increasedThe temperature stayed the same30s
- Q15Which of the chemical reactions shows an exothermic reaction?Hydrogen Peroxide and YeastIodine and Liquid StarchBaking Soda and Vinegar30s
