Choosing my object...
I wanted to experiment chemical and physical properties with an object that I could test in a lot of different ways. I picked the glue stick because it is easy, safe, and interesting to work with. It is also very important to know the chemical changes that occur with glue sticks because it is often used with small children.
Physical Properties
1. clear/white2. sticky/squishy
3. not malleable
4. not magnetic
5. 3.3 cm long
Chemical Properties
1. sweet odor
2. tasteless
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| testing flammability |
3. flammable
At first the fire had little affect on the glue, but after a while it caused the glue stick to first bubble then melt an burn. These are all signs of chemical changes acurring.
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| no reaction with vinegar |
4. does not react violently with acid
There was no reaction with the vinegar because the glue stick is acid-free.
There was no reaction with the vinegar because the glue stick is acid-free.
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| no reaction with bleach |
5. does not react violently with bleach
Like the vinegar, there was no reaction with the bleach because the glue was acid-free.
The glue stick was neutral and unresponsive with many of the chemicals because the glue stick is made to be simple and safe to use.
I like that you used a glue stick for your experiment. It was interesting that you proved that the glue did not react with the acids because it is made to be safe. It could help if you explained how the sweet odor and tastelessness of the glue is a chemical property. Also, you could explain that the glue's flammability is a chemical property because it caused the glue stick to change color and composition. Your pictures and the organization of your blog are very helpful to understand your experiments. Your blog looks great!
ReplyDeleteI thought it was interesting that you used a glue stick. In your beginingcobservations you explained that the glue stick was tasteless and had a sweet odor, which are both chemical properties. It would have been interesting if you would have tried to change the odor or taste of the glue stick, which I know is probably really hard to do. I liked how you proved that it did not react with acid or bleach because it was acid-free. The only other thing is you could have explained why the burning the glue was a chemical change, but your blog looks so good and your project was really cool!!!!
ReplyDeleteI think that your choice of object was extremely creative! i also really liked your examples on how the glue was acid free. i didnt realize how careful companys had to be to make safe glue for all ages of children. However, when you were naming your chemical properties i came across taste. I think that you could have chosen a better example of a chemical property because YOU SHOULD NEVER EAT GLUE! but other than that you pictures were very helpful in showing what you did in the experiment and also your blog was very eye-catching!
ReplyDeleteGlue was a fun and creative choice. Your experiment was very well done. I believe that the reason the glue did not react with any of the acids is because most glue companies make sure that it is safe for kids. More pictures could have been used to show how each experiment went. But, for your chemical property "tastless", it is recomended you not taste the glue even though it is harmless.
ReplyDeleteNice try. Your experiment is truly inspirational such that I need not perform it again. Bravo!
ReplyDelete