Written by Jacqueline Barber
An ordinary ziplock bag becomes a safe and spectacular laboratory
as students mix chemicals that bubble, change color, get hot,
and produce gas, heat, and odor. Chemical Reactions explores
chemical change, demonstrates endothermic and exothermic reactions,
and develops skills in observation, experimentation, and inference.
Like all GEMS guides, it includes assessment suggestions and
literature connections, provides the teacher with necessary
safety precautions, and provides guidance in assembling materials.
Chemical Reactions is a great introduction to chemistry
and has often been adapted for lower grade levels. This "GEMS
Classic" continues to be one of the most popular guides
in the series, and would make an excellent overview before presenting
the GEMS unit Dry Ice Investigations,
which focuses on the properties of one intriguing substance
in the greater context of chemical reactions in general.
Recommends Chemical Reactions
"Every year as I work to eliminate fluff in my curriculum
in exchange for good concrete practical skills, I never go wrong
with the GEMS teacher guides. In particular, Chemical Reactions
provides activities that allow students to think and act like
scientists. Learning science does not come from reading an enormous
science textbook but from doing, reading, experiencing, and
concluding. Chemical Reactions fits the bill!"
National Science Teachers Asociation Recommends
Comment on this GEMS unit.