Name: ____________________________________ ___________________________________ Class: _____
Smore Lab
…
We will explore physical and chemical changes in matter by making smores!
This lab activity involves fire; remember to be extremely careful.
1 skewer
1 Bunsen burner
1 marshmallow
2 crackers
1 block of chocolate
Step 1: Break a block of chocolate off and place it on one cracker.
Step 2: Stick one marshmallow firmly on the end of the skewer
Step 3: Turn on your Bunsen burner and roast your marshmallow.
REMEMBER! Do not hold it too close. If your marshmallow catches fire, remove it from the flame and blow on it. DO NOT fling it!
Step 4: When your marshmallow is roasted, put it on top of the chocolate on the cracker. Use the other cracker to sandwich the
marshmallow. Now pull the skewer out of the marshmallow.
Step 5: Observe the substances. What happened to the crackers? What is happening to the chocolate? How does the marshmallow
feel?
Step 6: EAT IT! Careful, it might be hot.
1.
In the table, check if a physical or chemical change that took place and explain how you know.
SUBSTANCE
Cracker
PHYSICAL CHANGE
EXPLAIN
CHEMICAL CHANGE
EXPLAIN
Chocolate
Marshmallow
2. When you ate the cracker, it went to your stomach that will digest it. What will your body do with the smore? Is this a physical or
chemical change?
My body will _______________________________________________________________________________________
This is a _________________________ change.
3. Write down 2 examples of physical changes and 2 examples of chemical changes you can see in your life.
Example 1
Example 2
Physical Change
Chemical Change