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Decomposers Unit Activity 3.2 Observing Bread Molding

Explore bread molding process using carbon transformations. Observe mass changes and BTB color variations. Compare results with other groups for analysis. Revisit predictions to understand environmental literacy.

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Decomposers Unit Activity 3.2 Observing Bread Molding

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  1. Carbon: Transformations in Matter and Energy Environmental Literacy ProjectMichigan State University Decomposers UnitActivity 3.2 Observing Bread Molding

  2. Unit map You are here

  3. Investigation set up from Pre-Lesson

  4. Investigation tools • What mass changes will we observe? • What changes in BTB will we observe?

  5. Day 1 Instructions (Day 1) Find the Mass of Your Bread and Mold. • ☐ Collect your labeled Petri dish with bread and mold, a digital balance, and your worksheet from the Pre-Lesson. • ☐ Look on your worksheet from your Pre-Lesson and find the beginning mass of your Petri dish and bread from 7 days ago. Write the mass on your 2.2 Observing Bread Molding Worksheet in the table where it says “Mass of Petri dish and bread and mold before (7 days ago).” • ☐ Turn on your digital scale until it reads 0.00g. Place the entire Petri dish with the lid onto the scale. Record the final mass of your Petri dish where it says “End Mass (after 7 days)” in the table below. Note: DO NOT open the lid—classmates may have allergies to bread mold. • ☐ Record the final mass of your Petri dish, bread, and mold on your 2.2 Observing Bread Molding Worksheet in the table where it says “Mass of Petri dish and bread and mold after (today).” (Day 1) Set up the BTB Investigation. • ☐ Gather a large, sealable container (1 per group). • ☐ Stack all four of your group’s Petri dishes in the container. • ☐ Put an open Petri dish with BTB in it next to the moldy bread inside the container. • ☐ Record the color of the BTB on your 2.2 Observing Bread Molding Worksheet in the table where it says “Color of BTB before.” • ☐ Seal the container and wait 24 hours for results.

  6. Let’s do the investigation! • What mass changes do you observe? • What changes in BTB do you observe?

  7. Possible BTB colors

  8. Before you leave, Day 1 • Leave bread overnight in sealed container • Record mass of Petri Dishes • Record color of BTB

  9. Collect data, Day 2 • Collect data and record your observations on Part C of the 2.2 Observing Bread Molding Worksheet

  10. Bread mold class results

  11. Comparing group results Results for mass changes • What patterns are there in measurements made by all the groups? • Do the patterns match your predictions? Results for BTB changes • What patterns are there in observations made by all the groups? • Do the patterns match your predictions?

  12. Bread molding video

  13. BTB results for Ms. Drayton’s class How do your results compare with the results from Ms. Drayton’s Class?

  14. Mass results for Ms. Drayton’s class How do your results compare with Ms. Drayton’s class results?

  15. Complete Part E of the worksheet • Compare your observations with other groups. • Describe any patterns you see in the data on Part E of the 2.2 Observing Bread Molding Worksheet

  16. Revisit your predictions • Which predictions were correct? • Which predictions were incorrect? • What did we see? What does it mean? • What questions do you still need to answer?

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