# Step-by-Step

In this Section

Part 1— Choose a cookie recipe

Part 2— Review information on cookie ingredients

Part 3— Use Google Earth tool to map the locations of each ingredient’s source

Part 4— Calculate the food miles for the chosen cookie

Optional Part 5 – Have students calculate the carbon dioxide produced

## Part 1—Choose a cookie recipe

• Have students choose a type of cookie. They may bring in a favorite recipe from home or choose one from the six provided. If students choose to bring one from home they will be responsible for finding where any additional ingredients come from.
• If teachers choose to have students work in groups, organize them by the type of cookie they choose.
• Have students log onto a computer and open the MS PowerPoint file Cookie Ingredients.ppt. Once the file is opened have them view the presentation in slideshow mode. Here they may click on each ingredient they need and it will link to a slide with all the information they may need.
• Students should record where each ingredient comes from in their student worksheet.

## Part 2— Review information on the ingredients that are required for the chosen cookie type

(Recommended: have students choose two different locations for where their ingredients come from, then compare the two at the end of the activity. If time is short, have subsets of students within each group use different locations for each ingredient – you can assign a “conventional” and a “local” students, then compare results.)

## Part 3— Use Google Earth to map the countries or towns where each ingredient comes from

• Using Google Earth place push pins at each location where an ingredient comes from. Have students insert a push pin where their home is, then use the “add a path” feature to connect the push pins at each ingredient to the pin at their home. A tutorial is available to help with Google earth
• In the options menu for the path, record the distance that each ingredient has to travel to reach the student’s home. Have them record the distances in their student worksheet.
• Have students add the distances travelled by each individual cookie ingredient to yield the total food miles for their type of cookies.
• Have each student put their cookie type and food miles on the board.  Prompt students to compare food miles and cookie types and discuss the differences.
• Direct students to the MS Excel worksheet Calculating CO2 worksheet.xls; have them open the worksheet side by side with their completed student worksheet.
• Students should enter the amount of each ingredient required in their cookies in the yellow boxes in units of cups or tsps.
• Once the students have completed how much of each ingredient is required they can then fill out the miles each ingredient has traveled under the column for the most likely mode of transportation for each particular ingredient.
• Repeat for Option B, and compare the two carbon dioxide emissions; continue with the discussion questions.

## Part 4— Calculate the total food miles for a batch of cookies

• Have students add the distances travelled by each individual cookie ingredient to yield the total food miles for their type of cookies.
• Have each student put their cookie type and food miles on the board.  Prompt students to compare food miles and cookie types and discuss the differences.
• Direct students to the MS Excel worksheet ; have them open the worksheet side by side with their completed student worksheet.Calculating CO2 worksheet.xls
• Students should enter the amount of each ingredient required in their cookies in the yellow boxes in units of cups or tsps.
• Once the students have completed how much of each ingredient is required they can then fill out the miles each ingredient has traveled under the column for the most likely mode of transportation for each particular ingredient.
• Repeat for Option B, and compare the two carbon dioxide emissions; continue with the discussion questions.