Two students are making Smores. Student 1 says that making Smores is a physical change because the graham crackers, marshmallow, and chocolate are simply a mixture. Student 2 says that making Smores is a chemical change because the marshmallow begins to burn when you place it in the fire and becomes dark and crispy on the outside. Who is correct and why?

PHYSICAL SCIENCES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Two students are making S’mores. Student 1 says that making S’mores is a physical change because the graham crackers, marshmallow, and chocolate are simply a mixture. Student 2 says that making S’mores is a chemical change because the marshmallow begins to burn when you place it in the fire and becomes dark and crispy on the outside. Who is correct and why?

A	Student 1 is correct.
B	Student 2 is correct.
C	Both students are correct because making S’mores is a physical change when you put the substances together, but a chemical change also occurs when the marshmallow burns.
D	Student 2 is correct because once the crackers, marshmallow, and chocolate are placed together, the mixture cannot be reversed again.

Explanation:

Detailed explanation-1: -Both students are correct because making S’mores is a physical change when you put the substances together, but a chemical change also occurs when the marshmallow burns.

Detailed explanation-2: -When you toast a marshmallow over a flame, a chemical reaction happens between the sugar and gelatin in the marshmallow. The reaction turns its outside brown and crispy. A marshmallow’s melting point is about 45°C (113°F). That’s the temperature at which a solid becomes a liquid.

Detailed explanation-3: -s’more changes in matter Work on changes in matter with making a s’more! the breaking of the graham cracker and melting the chocolate are physical changes.

Detailed explanation-4: -The science behind roasting marshmallows When you toast marshmallows, the heat causes a chemical reaction producing water molecules, which then evaporate, leaving carbon behind (the blackened part of the roasted marshmallow).

Detailed explanation-5: -The chemical reactions can actually be seen by the eye when you make s’mores around the fire. The golden-brown color can come from two different reactions: caramelization and the Maillard reaction. When the sugar gets hot enough, it starts to break down into smaller molecules that then react with one another.

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