Activity 3.2PT: Observing Plants’ Mass Changes, Part 1 (30 min)

Target Student Performance

Students harvest their radish plants and dry down the plants and the paper towel or gel in preparation for Activity 3.4.

Resources You Provide

  • Containers of radish plants from the Pre-Lesson (1 per group)
  • Digital scale (1 per group)
  • Small paper bags or envelopes for drying plants (1 per container)
  • Sunny windowsill or drying oven (domestic ovens work at low settings)
  • Markers to label plants by student or group (1 per group)

Resources Provided


Prepare your computer and projector for the 3.2PT Observing Plants’ Mass Changes, Part 1 PPT. Print one copy per student of the 3.2PT Observing Plants’ Mass Changes, Part 1 Worksheet.


1. Use the instructional model to show students where they are in the course of the unit.

  • Strategic grouping with strong speakers 
  • Compare class data orally and on the spreadsheet
Extending the Learning
  • Follow the same procedures to investigate other plants growing, such as peas.