November 3, 2010
by: Elaine Kotler
I created a lab using the Instant Snow Polymer (Sodium Polyacrylate) from Educational Innovations that I use in my 8th grade Physical Science Class as well as Summer School Programs that I teach for grades 4-9. This lesson incorporates concepts of Conservation of Mass, Properties of Matter, Metric Measurement and Conversion, and Observation Skills. The lab, as I give it to the students, is listed below.
Each student receives an empty baggie to be used for comparison, a baggie containing 12 grams of Instant Snow Polymer, use of a balance and a graduated cylinder.
I have already explained the Law of Conservation of Mass, and Density (they need to remember that the density of water is 1 g/ml, or look it up) prior to introducing this lab activity. However, they do not know the terms exothermic, endothermic, hydrophobic or hydrophilic. My students are allowed to look them up, but unless they make careful observations as they are conducting the experiment, they won’t be able to answer the questions later.
The final question “What is That Stuff?” garners some interesting answers. Some recognize a use for it as snow for ski slopes; others have suggested material for ice packs. One suggestion was to use the powder to help clean up and absorb spills. Read the rest of this entry »
3 Comments | Chemistry, Elementary level, experiments, High School level, Middle School level | Tagged: Conservation of mass, conservation of matter, discrepant event, endothermic, exothermic, hydrophilic, hydrophobic, observation skills, phenomenon based learning, sodium polyacrylate | Permalink
Posted by Tami O'Connor
October 5, 2010
by: Lee Walker
When we are doing a Partnership for Learning.com Science Adventure on phases of matter we like having this conservation of mass experience in the bag of tricks. It can be done in minutes and is extremely reliable. All you need is the simplest (and least expensive) OHAUS classroom balance from Educational Innovations, the Ice Melting Block set from Educational Innovations, a pair of wire cutters and some paper clips, (just in case you need to whip up some mass bits of less than a gram) and a nicely formed ice cube. We like to use the aluminum blocks and O-rings from two of the Ice Melting Block sets just to simplify the balancing and have found that having more than one set of the blocks is good for the original activity anyway.
Here we go……. Read the rest of this entry »
Leave a Comment » | Chemistry, College level, Elementary level, experiments, High School level, Middle School level, Physics | Tagged: Conservation of mass, phases of matter, phenomenon based learning, simple classroom experiment | Permalink
Posted by Tami O'Connor