Physical and Chemical Properties of Matter

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 crushing.

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 rusting, burning, and cooking.

Front

Is spoiling food a physical or chemical change?

Back

Chemical change.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the environment, forming iron oxide (rust).

Front

Is burning wood a chemical or physical change?

Back

Chemical change.

Front

What is an example of a physical change?

Back

Crushing an aluminum can.

Front

What happens during a chemical change?

Back

During a chemical change, the bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

Front

What is the difference between physical and chemical properties?

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Physical properties can be observed without changing the substance's chemical identity (e.g., color, melting point), while chemical properties can only be observed during a chemical reaction (e.g., reactivity with acid).

Front

What is an example of a chemical change?

Back

Rusting metal.

Front

What is a phase change?

Back

A phase change is a type of physical change where a substance changes from one state of matter to another, such as solid to liquid (melting) or liquid to gas (evaporation).