The STC "Chemical Tests" unit
In "Chemical Tests", a 16 lesson unit designed for third graders, students
begin to use critical thinking skills to solve mysteries such as "What are
the identities of five unknown solids?" By conducting a variety of physical
and chemical tests, students explore some concepts basic to general
chemistry; physical and chemical properties and how to describe them, and
changes that may occur when different solids and liquids are mixed together
or separated. As a result, students are introduced to solubility,
filtration, evaporation, crystallization, and acids, bases, and neutrals.
Along the way, they also develop essential skills: observing, recording,
questioning, analyzing, and drawing conclusions.
The above is quoted directly from the "Chemical Tests" teacher's manual.
Interesting sites
Parents, try some experiments at home with your third grader!
http://personal.cfw.com/~rollinso/SciFood.html
Other Resources