Science: Reversible and Irreversible Changes to Matter

Front

What is a reversible change?

Back

A reversible change is a change that can be undone or reversed, such as melting ice back into water.

Front

What is an irreversible change?

Back

An irreversible change is a change that cannot be undone, such as burning wood to ash.

Front

Give an example of a reversible change.

Back

An example of a reversible change is freezing water to make ice.

Front

Give an example of an irreversible change.

Back

An example of an irreversible change is cooking an egg.

Front

What happens to matter in a reversible change?

Back

In a reversible change, the matter can return to its original state.

Front

What happens to matter in an irreversible change?

Back

In an irreversible change, the matter changes permanently and cannot return to its original state.

Front

Is melting chocolate a reversible or irreversible change?

Back

Melting chocolate is a reversible change because it can solidify again.

Front

Is rusting of iron a reversible or irreversible change?

Back

Rusting of iron is an irreversible change because the iron cannot return to its original state.

Front

What is an example of a reversible change in nature?

Back

An example of a reversible change in nature is the water cycle, where water evaporates and then condenses back into liquid.

Front

What is an example of an irreversible change in cooking?

Back

An example of an irreversible change in cooking is baking a cake.