Complete the sentence.
Baking a loaf of bread is a ().
chemical change physical change
Chemical changes and physical changes are two ways matter can change.
In a chemical change, the type of matter changes.
Burning a piece of paper is a chemical change. The paper changes into ash and smoke.
In a physical change, the type of matter stays the same.
Cutting a piece of paper is a physical change. The cut pieces are still made of paper.
Ice melting is also a physical change. When ice melts, it changes from a solid to a liquid. But both ice and liquid water are made of the same type of matter: water! This kind of change is called a change of state.
Baking a loaf of bread is a chemical change. Bread is made from dough. Baking turns the dough into bread. The bread is a different type of matter than the dough.