In this activity, several changes will be made to samples of matter. your challenge will be to decide if the change is physical or chemical. you will also have to defend your choice. remember that when a physical change occurs to a substance, the identity of the substance and its physical properties do not change. however, when a chemical change occurs to a sample, the original material is converted to a new form of matter. this substance has a unique set of physical and chemical properties.
write a summary paragraph discussing this experiment and the results. use the following questions to guide the content of your paragraph.
submit your recorded observations for each step.
step 1: burning candle - record the mass and write your observations
step 2: cooling candle - record the mass and write your observations
step 3: tearing paper - record your observations
step 4: wet paper - record your observations
step 5: burning pieces of paper - record your observations
step 6: salt and water in test tube - record your observations
step 7: baking soda and vinegar - record your observations
answer the following questions.
what is the difference between a physical change and a chemical change?
what kind of change occurred in each test? what evidence do you have to support your decision? be brief, but be sure to defend your conclusion with data.
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