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NCTE Activity - Desiometer
Task with Student Directions

GLOBE Assessment
Grade K-4

Literacy Activity for Protocol Test

Write 4 sentences that make the reader “see” the tree canopy at your study site in each of the seasons.

Densiometer Protocol Test

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

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Construction & Use of Densiometer Protocol Test




Student activity & Level of Performance

+ appropriate student performance

- inappropriate student performance

n.a. not appropriate or not observed

















































Tube - 4 cm diameter 7 cm long

34 cm thread/floss

metal nut/washer















































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)
















































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