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Plants | Activity 3.2

Activity 3.2: Observing Plants’ Mass Changes, Part 1

Note: Activity 3.2 follows the pathways chosen in the Pre-Lesson.


Gel Protocol (2-turtle)

  • Activity 3.2GL: Observing Plants' Mass Changes, Part 1 (30 min)


Paper Towel Protocol (1-turtle)

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

Students harvest their radish plants, removing the gel from the roots, and measuring the wet mass of the plants and the gel. Students will also dry their plants in preparation for Activity 3.4

Materials You Provide

  • Tubes of radish plants from the Pre-Lesson (1 per student)
  • Digital scale (1 per group)
  • Small containers to collect gel from individual tubes to mass.
  • Small paper bags or envelopes for drying plants (1 per plant)
  • Sunny windowsill or drying oven (domestic ovens work at low settings)
  • Markers to label plants by student or group (1 per group)

Resources Provided

Setup

  • Each student or group of 4 students should have 1-2 tubes. For each group, provide a container to collect the gel that the students will extract from the plant roots. Unless you choose to dry out the gel, it will be discarded after the investigation.
  • Provide a paper towel, small paper bags, or envelopes (1 per plant), on which to place the plants to dry.
  • After the activity, students can assist with cleanup by rinsing out the plant test tubes.
  • Prepare your computer and projector for the 3.2GL Observing Plants’ Mass Changes, Part 1 PPT.
  • Print one copy per student of the 3.2GL Observing Plants’ Mass Changes, Part 1 Worksheet.

Directions

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

Assessment

Since this activity is primarily an opportunity for students to harvest their plants for Lesson 5, there is little content in this activity to assess. You can use the3.2GL Grading Observing Plants’ Mass Changes, Part 1 Worksheet to grade your students’ work in collecting observations on 3.2GL Observing Plants’ Mass Changes, Part 1 Worksheet.

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

Students harvest their radish plants, removing the plant roots from the paper towel, and dry down the plants and the paper towel in preparation for Activity 3.4.

Materials 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

Setup

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.

Directions

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

Assessment

Since this activity is primarily an opportunity for students to harvest their plants for Lesson 5, there is little content in this activity to assess. You can use 3.2PT Grading Observing Plants’ Mass Changes, Part 1 Worksheet to grade your students’ work in collecting observations on 3.2PT Observing Plants’ Mass Changes, Part 1 Worksheet.