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Forty experiments reveal the basic scientific concep..
Students can cook without electricity—and without po..
This easy-to-assemble kit uses a solar cell to drive..
Monitors dissolved oxygen in water as well as percen..
Measure long and medium wave UVA/B light quickly and..
For a class of 30 students. Students learn the basic..
Reliable, nontoxic combination dip strip gives accur..
Adapted from Standard Methods for the Examination of..
Students examine water samples collected from a vari..
Grade 3 and up. Using kit materials, students constr..