What distinguishes reversible changes from irreversible changes?

Reversible changes can be undone, returning to the original state, while irreversible changes result in new substances that cannot revert back.

Melting ice into water is an example of a ___ change.

Reversible change

True or False: Cooking is an example of a reversible change.

False. Cooking is an irreversible change because it creates new substances.

Fill in the blank: The expansion of water when cooled below 4°C is known as ___.

Anomalous expansion

What happens to the particles of a substance during expansion?

The particles become loose and move apart as the temperature increases.

Riddle: I can change my state from solid to liquid and back again, but once I boil, I cannot return the same way. What am I?

Water

List two examples of irreversible changes.

Burning wood and baking a cake

What is the process called when gas changes back to liquid?

Condensation

True or False: The digestion of food is a reversible change.

False. Digestion is an irreversible change because it produces new substances.

Fill in the blank: When vinegar is mixed with bicarbonate of soda, it causes an ___ change.

Irreversible