Question

fill in a word that correctly completes the sentence.
martina is camping and needs wood for a cooking fire as well as for shelter. she gathers a variety of logs and branches from the surrounding area.
she burns some of the smaller twigs and branches to start a fire in order to cook her dinner. burning wood is an example of a change in
property.

Explanation:

When wood burns, a new substance (ash, carbon dioxide, etc.) is formed. This is a chemical change as it involves a transformation at the molecular level. Physical changes only change the state or appearance (like cutting wood), but burning is a chemical reaction.

Answer:

chemical