Question

Using the image seen here, identify any statements that could be true. Select all that apply.



(4 points)
Responses

The heat produced by the fire physically changes the surrounding air.
The heat produced by the fire physically changes the surrounding air.

Burning campfire wood is a physical change.
Burning campfire wood is a physical change.

Burning campfire wood is a chemical change.
Burning campfire wood is a chemical change.

Toasting marshmallows results in a chemical change.
Toasting marshmallows results in a chemical change.

The heat produced by the fire chemically changes the surrounding air.
The heat produced by the fire chemically changes the surrounding air.

Toasting marshmallows results in both chemical and physical changes to the marshmallows.
Toasting marshmallows results in both chemical and physical changes to the marshmallows.
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Answer 1

Select all that could be true:

- The heat produced by the fire physically changes the surrounding air. — True. (Air is heated, expands and moves — physical changes.)
- Burning campfire wood is a physical change. — False. (Burning is combustion: a chemical change creating new substances like CO2, ash, smoke.)
- Burning campfire wood is a chemical change. — True.
- Toasting marshmallows results in a chemical change. — True. (Browning/char and Maillard/caramelization reactions are chemical.)
- The heat produced by the fire chemically changes the surrounding air. — False as stated. (The fire’s combustion changes air composition by consuming O2 and producing gases, but the heat itself produces physical changes; the chemical change is from the burning reaction.)
- Toasting marshmallows results in both chemical and physical changes to the marshmallows. — True. (Melting is physical; browning/char is chemical.)