Daniels SMORE Lab Name______You will be making smores to demonstrate and learn to recognize chemical and physical properties and changes in substances. Please write on your own paper.

Objective-

Be able to recognize and describe chemical and physical changes.

Supplies

 Marshmallows 1 for each person in your group.

 Chocolate 1 bar per table

 Graham crackers enough for each person to have 2 halves.

 Candle

 Matches

 Scale

 Ruler

Directions.

1. Obtain the supplies

2. List 5 physical and 5 chemical properties for each item listed below. (You can use the scale and ruler.)

Marshmallow Chocolate Graham cracker Candle Matches

Physical Physical chemical Physical chemical Physical Physical chemical chemical chemical Daniels

3. Now make the smores there should be enough for each person to make a smore. As you make them list each step as a chemical or physical change and explain why.

Step Is it a chemical Why? or physical change 1 Light match

2 Use lit match to light candle

3 Put marshmallow on skewer

4 Hold marshmallow over candle

5 Brown marshmallow

6 Break graham cracker in half

7 Break off two sections of chocolate

8 Put chocolate on one section of graham

9 Put marshmallow on chocolate

10 Put graham on top of marshmallow

11 Eat it

Answer the following questions Daniels

1. How did you decide if a step was a physical or chemical change?

2. Which steps did you list a physical changes?

3. What do they all have in common?

4. Which steps did you list as chemical changes?

5. What do they have in common?

6. Which type of change was most common? Why?

7. Write a definition in your own words for chemical change.

8. Write a definition in your own words for physical change.