Lesson 1 Discussion Your ideas about what happens to materials when they decay

Your ideas: 1. Your questions: 1. What happens to decaying materials?

Lesson 2 Investigation Investigating Bread Molding

Lesson 2 Activity 1 Initial explanations, predictions, and planning

Making Predictions Predicting mass changes What materials will gain and lose mass when mealworms grow and move? How are the mass changes connected with The Movement Question: Where are atoms moving? Use arrows on the worksheet to show your ideas Predicting BTB changes How will mealworms growing and moving change BTB? How are the BTB changes connected to The Carbon Question: What is happening to carbon atoms? Explain your ideas on the worksheet. How do you think that energy is changing from one form to another? Explain your ideas on the worksheet.

Three Questions Poster QuestionRules to FollowEvidence to Look For The Movement Question: Where are atoms moving? Where are atoms moving from? Where are atoms going to? Atoms last forever in combustion and living systems All materials (solids, liquids, and gases) are made of atoms When materials change mass, atoms are moving When materials move, atoms are moving The Carbon Question: What is happening to carbon atoms? What molecules are carbon atoms in before the process? How are the atoms rearranged into new molecules? Carbon atoms are bound to other atoms in molecules Atoms can be rearranged to make new molecules The air has carbon atoms in CO 2 Organic materials are made of molecules with carbon atoms Foods Fuels Living and dead plants and animals The Energy Question: What is happening to chemical energy? What forms of energy are involved? How is energy changing from one form to another? Energy lasts forever in combustion and living systems C-C and C-H bonds have more stored chemical energy than C-O and H-O bonds We can observe indicators of different forms of energy Organic materials with chemical energy Light Heat energy Motion

Answering the questions for bread molding What are your ideas? The Movement Question: Where atoms moving? (Where are atoms moving from? Where are atoms going to?) The Carbon Question: What is happening to carbon atoms? (What molecules are carbon atoms in before the process? How are the atoms rearranged into new molecules?) The Energy Question: What is happening to chemical energy? (What forms of energy are involved? How is energy changing from one form to another?)

Planning the Investigation How will you measure mass changes? How will you observe changes in the color of BTB?

Lesson 2 Activity 2 Observations and explanations of bread molding

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

Possible BTB Colors

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?

BTB Results for Ms. Drayton’s Class Day 1Day 2 start BTB color end BTB color blueyellow blueyellow blueyellow blueyellow blueyellow blueyellow How do your results compare with the results from Ms. Drayton’s Class?

Weight Results for Ms. Grintals’ Class How do your results compare with the results for Ms. Grintal’s class? Initial mass bread and mold in petri dish (g) Final mass after 7 days (g) Change in mass after 1 week (g) Average change in weight = -2.63

Explaining Group Results Explaining results for mass changes How are the mass changes connected with The Movement Question: Where are atoms moving? What unanswered questions do you have? Explaining results for BTB changes How are the BTB changes connected to The Carbon Question: What is happening to carbon atoms? What unanswered questions do you have? What did we learn about the Energy Question? What unanswered questions do you have?