PBL #2 on level S8P1. Obtain, evaluate, and communicate information about the structure and properties of matter. d. Construct an argument based on observational evidence to support the claim that when a change in a substance occurs, it can be classified as either chemical or physical.

Problem You work for the FDA (Food & Drug Administration) and you have been presented with the following problem. There has been an increase in the number of illnesses related to rotten food found in grocery stores. Your job is to educate the public about the fact that food rotting is the result of a chemical change and the evidence that indicates that a chemical change (rotting) is occurring in the food.

What do we know? Note all of those things you feel like you already know about: physical changes chemical changes rotting bananas and food safety

What do we need to know? Set up pages in your notebook for: What are physical changes? What evidence indicates when a substance has gone through a physical change? What are chemical changes? What evidence indicates when a substance has gone through a chemical change?

Process In order to properly educate the public, you will do a study on the rotting of a banana. You will use the data from this study to help you make a convincing, educational warning type presentation.

Solution You are required to create an FDA educational warning advertisement to be posted in all grocery stores in the United States. You may choose from the following options: poster (physical or digital,)pamphlet, text messaging ad. This ad should include: an explanation of the type(s) of changes the banana goes through (physical or chemical) the evidence that shoppers should look for that indicates the type of change that has occurred, evidence of a change that may not be readily apparent to the shopper. ways in which the rotting of the food can be stopped or delayed

What do warning posters look like?

What do warning pamphlets look like?

What do warning text conversation look like?