Exploring Changes in Matter
A) What question were you trying to answer and why?
A) The question we were trying to answer was "Which changes are examples of a chemical change, and which are examples of a physical change?". The reason why we were trying to answer this questions was because we needed to know that we saw something different in the experiments that wasn't there before.
B) What did you do during your investigation and why did you conduct your investigation in this way?
B) During the investigation we had a handful of different experiments that we conducted. The first one included a small ball of copper and required a bunsen burner. You would then place the small copper ball into a ceramic holder and as the copper ball began to heat up it changed color which made a chemical change as it turned to a silver/black color which meant it was no longer copper. The second experiment was simple with warm water and salt and you would then pour the salt into the water which made a physical change as the salt dissolved into the warm water.
The next experiment was with paraffin wax that was placed into a test tube as a solid. You would then place the tube into the warm water and take it out after a few minutes and saw how it became a liquid. After leaving it out for a moment or two, the wax would then return to a solid. The next experiment was involved with baking soda and a hydrocloric acid. You would then place five droplets of the hydrocloric acid and watch it make a chemical change with the baking soda and produce a fizz and a gas. Finally, the last experiment was mixing five drops of sodium hydroxide and five drops of copper nitrate which produced a gel. The reasons that the experiments were conducted in this way was because if not done right then we wouldn't have had the correct products that were produced.
C) What is your claim, evidence, and reasoning?
C) Our claim was that experiments one and five are physical changes and experiments two, three, and four are chemical changes. Our evidence would be that with experiments one and five we saw the same thing that was there before but with experiments two, three, and four we saw stuff that turned into things that weren't there before.. Our reasoning would be the evidence that was shown by conducting the experiments.
A) The question we were trying to answer was "Which changes are examples of a chemical change, and which are examples of a physical change?". The reason why we were trying to answer this questions was because we needed to know that we saw something different in the experiments that wasn't there before.
B) What did you do during your investigation and why did you conduct your investigation in this way?
B) During the investigation we had a handful of different experiments that we conducted. The first one included a small ball of copper and required a bunsen burner. You would then place the small copper ball into a ceramic holder and as the copper ball began to heat up it changed color which made a chemical change as it turned to a silver/black color which meant it was no longer copper. The second experiment was simple with warm water and salt and you would then pour the salt into the water which made a physical change as the salt dissolved into the warm water.
The next experiment was with paraffin wax that was placed into a test tube as a solid. You would then place the tube into the warm water and take it out after a few minutes and saw how it became a liquid. After leaving it out for a moment or two, the wax would then return to a solid. The next experiment was involved with baking soda and a hydrocloric acid. You would then place five droplets of the hydrocloric acid and watch it make a chemical change with the baking soda and produce a fizz and a gas. Finally, the last experiment was mixing five drops of sodium hydroxide and five drops of copper nitrate which produced a gel. The reasons that the experiments were conducted in this way was because if not done right then we wouldn't have had the correct products that were produced.
C) What is your claim, evidence, and reasoning?
C) Our claim was that experiments one and five are physical changes and experiments two, three, and four are chemical changes. Our evidence would be that with experiments one and five we saw the same thing that was there before but with experiments two, three, and four we saw stuff that turned into things that weren't there before.. Our reasoning would be the evidence that was shown by conducting the experiments.
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