Physical and Chemical Changes

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

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.

Front

Give an example of a chemical change.

Back

Baking a cake is an example of a chemical change because the ingredients undergo a chemical reaction to form a new product.

Front

Give an example of a physical change.

Back

Slicing bread is an example of a physical change because the bread's composition remains the same.

Front

What happens to water when it is heated to steam?

Back

When water is heated to steam, it undergoes a physical change as it changes from liquid to gas without altering its chemical structure.

Front

Are hard boiled eggs a physical or chemical change?

Back

Hard boiled eggs represent a chemical change because the proteins in the egg undergo a chemical reaction when heated.

Front

What is melting ice an example of?

Back

Melting ice is an example of a physical change because it changes from solid to liquid without changing its chemical composition.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form or appearance of a substance without changing its identity, while a chemical change results in the formation of new substances.

Front

Is rusting of iron a physical or chemical change?

Back

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

Front

What is an example of a reversible physical change?

Back

Freezing and melting water is an example of a reversible physical change.