Question

determine whether each statement is an example of a physical change or a chemical change. wood is burned.
☐ physical
☐ chemical
dry ice (solid carbon dioxide) vaporizes to form carbon dioxide gas.
☐ physical
☐ chemical
done

Explanation:

For "Wood is burned":

A chemical change involves a change in the chemical composition of a substance, forming new substances. Burning wood results in the formation of new substances like ash, carbon dioxide, etc., so it's a chemical change.

A physical change is a change in the physical state (like solid to gas here) without altering the chemical composition. Dry ice vaporizing just changes its state from solid to gas, and the substance remains carbon dioxide, so it's a physical change.

Answer:

chemical (the checkbox next to "chemical" should be selected)

For "Dry ice (solid carbon dioxide) vaporizes to form carbon dioxide gas":