GLOBE Assessment
Grade 9-12

Densiometer Protocol Test

The Air Temperature protocol test assesses students' ability to construct and use a densiometer.

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students--> Student activity & Level of Performance + appropriate student performance - inappropriate student performance n.a. not appropriate or not observed

Collect: Tube - 4 cm diameter 7 cm long 34 cm thread/floss metal nut/washer tape

Construct Densiometer

Use string & tape to form crosshair on end of tube

Leave some string hanging at bottom; use to tighten if strings loosen

Attach both ends of 18 cm string with metal nut/washer across other open end of tube

Hold vertically with metal nut/washer directly below the intersection of the crosshairs

Use the Densiometer

Look directly up at canopy; record vegetation that touches the crosshairs (+, -, Sky)