Physical and Chemical Changes Flashcard

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and boiling.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and changes the chemical composition of the substance. Examples include burning, rusting, and baking.

Front

Is boiling water a physical or chemical change?

Back

Boiling water is a physical change because it changes the state of water from liquid to gas without changing its chemical composition.

Front

What happens when bread is baked in the oven?

Back

Baking bread is a chemical change because it involves a chemical reaction that transforms the ingredients into a new substance.

Front

Is slicing bread a physical or chemical change?

Back

Slicing bread is a physical change because it alters the shape of the bread but does not change its chemical composition.

Front

What is an example of a chemical change involving eggs?

Back

Hard boiling an egg is a chemical change because it changes the egg's chemical structure, resulting in a new substance.

Front

What occurs when you light a match?

Back

Lighting a match is a chemical change because it involves a chemical reaction that produces heat and light, resulting in new substances.

Front

Can you name a physical change that involves water?

Back

Melting ice is a physical change because it changes from solid to liquid without altering its chemical composition.

Front

What is an example of a chemical change in everyday life?

Back

Rusting of iron is a chemical change because it involves a reaction with oxygen that forms a new substance, iron oxide.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not change the chemical composition of a substance, while chemical changes do result in new substances being formed.