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Decomposers | Pre-Lesson - Bread Mold Investigation Setup

Pre Lesson 1: Bread Mold Investigation Setup

Students set up an investigation in preparation for the Decomposers Unit. Bread and mold will be ready to use in about seven days.

Guiding Question

Guiding Question What happens when things decay?

Activities in this Lesson

  • Pre-Activity 0.1: Investigation Set Up (30 min)

Objectives

This lesson helps students start thinking about all of the unit objectives, but does not feature a mastery of any of them.

NGSS Performance Expectations

Middle School

This lesson helps students start thinking about all of the unit NGSS performance expectations, but does not feature a mastery of any of them.

Background Information

Pre-Lesson should be conducted at least seven days before you plan to begin the Decomposers Unit.

In Pre-Activity 0.1, students set up an investigation that allows them to measure mass change in moldy bread over the course of a week. This sets the stage for students to be able to ask questions about what is happening to matter and energy during the decay process. Note: Bread that appears to have no mold growing on it might actually have mold that is invisible to the naked eye. Students may have initial ideas about the Three Questions for moldy bread, which will be recorded in Lesson 1

A note on mass and weight: Grams and kilograms in the SI (metric) system are units of mass—the amount of matter in a system. On the other hand, pounds and ounces in the English system are units of weight—the force of gravity on a particular mass. As long as gravity doesn’t change, these units are interconvertible: The force of gravity on a 1 kg mass is about 2.205 pounds. Since most American students are more familiar with the English units of weight, we sometimes use “weigh” and “weight,” especially when encouraging students to express their own ideas. When referring to measurements in grams, we use “mass” as both a verb and a noun.

Key Carbon-Transforming Processes: Digestion, Biosynthesis, Cellular Respiration

Unit Map

Decomposers Lesson 1 Unit Map