Question

burning wood to heat up a grill:
select
chemical change
physical change
part 2 of 3
dissolving sugar in water:
select

Explanation:

Sub - question 1: Burning wood to heat up a grill

Burning wood involves a reaction where wood (mainly cellulose, lignin etc.) reacts with oxygen to form new substances like carbon dioxide, water vapor, and ash. A chemical change is defined as a process where new substances are formed, so burning wood is a chemical change.

When sugar dissolves in water, the sugar molecules are dispersed in the water but the chemical composition of sugar (sucrose) and water remains the same. No new substance is formed. A physical change is a change in which the substance's chemical identity does not change, only its physical state or appearance changes. So dissolving sugar in water is a physical change.

Answer:

chemical change

Sub - question 2: Dissolving sugar in water