Let’s Get Cooking! DISCOVERING: What ingredients come together to form CHEMICAL and PHYSICAL CHANGES? Things are heating up in our cafeteria! Students …. We have a problem!
What ingredients come together to form CHEMICAL and PHYSICAL CHANGES?
Students …. We have a problem!
Our cafeteria workers have VANISHED, and all of their recipes have disappeared with them! All we can find are these books with strange recipes.
We need YOU to help us prepare these things so we can feed the students today. Look in these books and see if you can make any sense of it!
Well, class, it says right here on this recipe to “use raisins and flour to make a physical change.” And then later it tells us to “cause a chemical change to occur.”
Physical and Chemical Changes? Didn’t we just read about that in Science class? Yes, and it says on today’s outline that we’re going to watch a video about it today. Let’s watch it now!
We will watch the video, class, but first let’s review what we learned yesterday. Can someone tell me the definitions of Chemical Change and Physical Change?
Chemical Change: The process by which the substances present at the beginning of the change are not present at the end; new substances are formed. The change cannot be “undone.”Definitions
<From bread to burnt toast
Click here to see the United Streaming Video on Matter and Its Properties. You will need to use your username and password to get in!
Click here to see the Brain Pop Video on Chemical and Physical Changes.
Now that you’ve learned even more about the differences in Chemical and Physical Changes, you MAY be able to help us figure out these recipes in the kitchen! Let’s see what you know… Answer these questions, and you will earn a kitchen pass.
**Type your answers to the following questions in the boxes provided.
1. What is the definition of a chemical change?
2. What is the definition of a physical change?
3. Give 2 examples of a physical change.
4. Give 2 examples of a chemical change.
Take quiz here!
Go to this quiz site and test your knowledge!!
Now, you can go on and create your very own kitchen pass, so the cooking can begin!
Enter your information above, then insert a photo of yourself into your pass! Congratulations! You may now enter the food service area!
Well, it’s these recipe books!! Instead of giving clear and concise directions, they are giving instructions to create physical and chemical changes! Can you PLEASE help??
1 package active dry yeast
1/4 cup warm water
1 cup raisins
1/4 cup soft butter
1/4 cup sugar
1 1/2 teaspoons salt
1/2 cup scalded milk
3 3/4 cups all-purpose flour
2 eggs, beaten
Raisin Bread Recipe Continued…
Okay… now let’s decode the recipe.
1. Why does the first instruction ask for a chemical change?
2. What is instruction number 2 telling you to do?
3. Why is this a physical change?
Alright! You’re good to go! You can go ahead and start cooking!
With your partner or group, select one of the recipes from the following link, and change the directions to match what you found in the cafeteria’s mixed up recipes.
Choose a food that you would enjoy eating. Write your recipe on the recipe card given to you.
Title of Lesson: Chemical and Physical Changes: What’s what in the kitchen?
You may write in your journal about your experience as a cafeteria worker. Be sure to note the ways you could tell which steps required a physical change, and which steps required a chemical change.