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Plants | Activity 5.1

Activity 5.1: Observing Plants’ Mass Changes, Part 2 (45 min)

Students harvest their plants and collect and compare data during this investigation.

There are options embedded in this Activity to choose from depending on which version of the Pre-Lesson you chose to teach. In 5.1PT, students measure the mass of their dried radish plants from their bulk growth containers and compare it with the mass of the dried paper towel the plants were grown in. In 5.1GL, students measure the mass of their dried radish plants grown in test tubes, comparing the dry mass with the estimated dry mass in 3.4 and with the estimated or (optional) actual dry mass of the gel.


Gel Protocol

  • Activity 5.1GL: Observing Plants' Mass Changes, Part 2 (45 min)


Paper Towel Protocol

Activity 5.1GL: Observing Plants’ Mass Changes, Part 2 (45 min)

Materials You Provide

Resources Provided

Setup

By the time you are completing this Activity, your plants and gel (optional) should be completely dried out. Prepare an empty container for each group on which students can measure their masses.

Print the a href="http://media.bscs.org/carbontime/plants/posters_spreadsheets/5.1_GL_Observing Plants_Mass_Changes_Class_Results_11_x_17_ Poster.pdf" target="_blank">5.1GL Observing Plants’ Mass Changes Class Results 11 x 17 Poster before class. Your students will also need their copies of the worksheets they completed in Pre-Activity 0.2GL, Activity 3.1GL, and Activity 3.4GL. Print one copy of 5.1GL Observing Plants’ Mass Changes, Part 2 Worksheet for each student. Prepare a computer with an overhead projector to display the PPT.

Directions

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

Assessment

  • Use the class discussion to interpret how successful your students are at identifying patterns in the class data. Use the 5.1GL Grading the Observing Plants’ Mass Changes, Part 2 Worksheet to determine if your students had any trouble with data collection.
  • During this activity, note students’ success in measuring changes in mass. Also note students’ ability to reach a consensus about patterns in data and how they interpret results.
  • The discussions in steps 3 and 4 can be helpful for informal assessment in two ways: 1) It can help you assess your students’ skills in identifying sources of error and finding patterns in data, and 2) it can help you assess how well students identify the limits of the evidence. Do they recognize that the investigation does not fully answer the Matter Change Question?

Tips

  • Be sure to collect results from the different groups and compare their measurements. Discuss threats to accuracy of measurement.
  • Check to see if students can identify unanswered questions from the investigation.

Extend the Learning

  • Have students make predictions and design investigations to see how the results of the investigation would change if they used different types of plants.

Activity 5.1PT: Observing Plants’ Mass Changes, Part 2 (45 min)

Materials You Provide

Resources Provided

Setup

By the time you are completing this Activity, your plants and gel (optional) should be completely dried out. Prepare an empty container for each group on which students can measure their masses.

Print the 5.1PT Observing Plants’ Mass Changes Class Results 11 x 17 Poster before class. Your students will also need their copies of the worksheets they completed in Pre-Activity 0.2PT, Activity 3.1PT, and Activity 3.4PT. Print one copy of 5.1PT Observing Plants’ Mass Changes, Part 2 Worksheet for each student. Prepare a computer with an overhead projector to display the PPT.

Directions

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

Assessment

  • Use the class discussion to interpret how successful your students are at identifying patterns in the class data. Use the 5.1PT Grading the Observing Plants’ Mass Changes, Part 2 Worksheet to determine if your students had any trouble with data collection.
  • During this activity, note students’ success in measuring changes in mass. Also note students’ ability to reach a consensus about patterns in data and how they interpret results.
  • The discussions in steps 4 and 5 can be helpful for informal assessment in two ways: 1) It can help you assess your students’ skills in identifying sources of error and finding patterns in data, and 2) it can help you assess how well students identify the limits of the evidence. Do they recognize that the investigation does not fully answer the Matter Change Question?

Tips

  • Be sure to collect results from the different groups and compare their measurements. Discuss threats to accuracy of measurement.
  • Check to see if students can identify unanswered questions from the investigation.

Extend the Learning

  • Have students make predictions and design investigations to see how the results of the investigation would change if they used different types of plants.