P1.1 - 3: Physical and Chemical Properties and Changes

Front

What is a chemical change?

Back

A chemical change is a process in which new substances are formed, involving a rearrangement of atoms and a change in chemical 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 physical change.

Back

An example of a physical change is boiling water, where the water changes from liquid to gas but remains H2O.

Front

What happens during condensation?

Back

During condensation, water vapor cools and changes into liquid water, which is a physical change.

Front

What is the effect of dyeing a shirt?

Back

Dyeing a shirt is a physical change because it alters the color of the shirt without changing its chemical structure.

Front

What are the indicators of a chemical change?

Back

Indicators of a chemical change include color change, gas production, temperature change, and the formation of a precipitate.

Front

What is the difference between physical and chemical properties?

Back

Physical properties can be observed without changing the substance's identity, while chemical properties can only be observed during a chemical reaction.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rusting of iron, where iron reacts with oxygen to form iron oxide.

Front

What does it mean if matter changes in amount, size, or shape?

Back

If matter changes in amount, size, or shape, it is undergoing a physical change, as its chemical identity remains the same.

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, such as freezing and melting, but some may not be easily reversible.