Use an image of a marshmallow burning over a fire to determine which statements are true.

Question

A. Burning campfine wood is a chemical change.
B. Burning campfire wood is a physical change.
C. The heat produced by the fire physically changes the surrounding air.
D. Toasting marshmallows results in a chemical change.
E. The heat produced by the fire chemically changes the surrounding air.
D. Toasting marshmallows results in a physical change only.

Answer 1

Based on the context of burning and toasting marshmallows and campfire wood over a fire, here are the evaluations of each statement:

A. True - Burning campfire wood is a chemical change because it transforms the wood into ash, gases, and other substances through combustion.

B. False - Burning campfire wood is not a physical change; it results in new substances being formed, which characterizes a chemical change.

C. True - The heat produced by the fire can physically change the surrounding air, such as warming it up, though the air itself does not undergo a chemical transformation.

D. True - Toasting marshmallows results in a chemical change. When marshmallows are toasted, the sugars caramelize and can produce new flavors and compounds due to the heat.

E. True - The heat produced by the fire can chemically change the surrounding air, such as through the production of smoke or other gases as the fire burns.

F. False - Toasting marshmallows does not result in a physical change only; it involves both physical changes (melting, browning) and chemical changes (chemical reactions that produce new compounds).

In summary:

• A: True
• B: False
• C: True
• D: True
• E: True
• F: False