Two men want drinks and the first orders H2O. The second man orders H2O too, but he dies. Scholars apply their knowledge of H2O2 and other everyday chemicals during the activity. They match chemical formulas to common chemical names in a set of four puzzles.

Concepts

chemicals, chemical compounds, chemical formulas

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Additional Tags

science

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Instructional Ideas

• Divide scholars by ability groups and have the top group compete for the fastest time on the online version, the on-target group complete the worksheet independently, and the struggling group work in small groups on the worksheet

Classroom Considerations

• Assumes prior knowledge of how to solve gridlocks, which are similar to Sudoku puzzles
• Depends on pupils knowing the chemical formulas for everyday chemicals 

Pros

• Includes an answer key
• Online version offers hints

Cons

• None

Common Core

RST.6-8.4 RST.9-10.4 RST.11-12.4