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Bryan Miley
Reviewed in the United States on August 27, 2024
I loved that they were not labeled. This allowed the students to test the density using a balance and graduated cylinders to determine what the unknown metal was. This added some mystery versus the students already knowing exactly what the metal was to test the density that they already knew. The metals are fairly easy to identify as they are in good condition. (They are all nearly the same size which allows you to determine half of them based on weight and the other half based on color. The heaviest is lead, with the lightest being aluminum. The copper and brass are very easy to identify with the brass being golden in color and the copper being more bronzish/brown. The zinc is a little more dull than the iron and lead but not as shiny as the aluminum.) Iron is also the only one that is magnetic. (So use a magnet to find the only one that sticks and you know it is iron.)
Rayray
Reviewed in the United States on April 9, 2022
Nothings marked
Avid Reader
Reviewed in the United States on April 18, 2021
This would be a great kit, but the cylinders are not labeled, so be prepared to do a ton of work and math to figure out which is which. The seller was helpful with an answer to my question, telling me which metal was which in terms of matching to the photo. However, I was sent a used kit (which was also missing the instruction leaflet), so they had not been put back in order. DO NOT TAKE THE CYLINDERS OUT THE CONTAINER UNTIL YOU'VE IDENTIFIED THEM ACCORDING TO THE PHOTO ON AMAZON AND THE SELLER'S ANSWER BELOW! And hope that you've been sent a kit that hadn't already been opened.Because my son needed these for a school project, we had to do a ton of work to check density of the metals and be sure that he had the correct cylinders for his experiment. In particular, it is difficult to tell the difference between the iron and zinc. Both are supposed to be lustrous, but the zinc oxidized quickly and looked the same. After doing the math, the density of the zinc is actually 6% less than it should be - although for the purpose of a high school experiment, that's probably OK. But, thank goodness for having a parent who is a scientist who could figure all this out before the kiddo did his experiment. Without that input, it would have been hopeless.Amazon couldn't sort out my order and get the leaflet to me in time, so promised a ten dollar credit, but as yet, that hasn't appeared in my account. It's a shame, as this kit should be perfect for use in high school experiments. A simple mark/engraving on the bottom of each cylinder would solve the problem instantly.
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