4A Chemical and physical properties and changes

Front

What is density?

Back

Density is a physical property that measures the mass of a substance per unit volume.

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

What is a chemical property?

Back

A chemical property is a characteristic of a substance that describes its ability to undergo a specific chemical change.

Front

What is a chemical change?

Back

A chemical change is a process that involves the transformation of one or more substances into different substances with new chemical and physical properties.

Front

Give an example of a physical property.

Back

The smell of coffee is an example of a physical property.

Front

Give an example of a physical change.

Back

Water being heated and changed to steam is an example of a physical change.

Front

Give an example of a chemical property.

Back

The fact that gold cannot react with oxygen is an example of a chemical property.

Front

Give an example of a chemical change.

Back

Baking a cake for your friend's birthday is an example of a chemical change.

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 happens to the molecules during a physical change?

Back

During a physical change, the arrangement of molecules may change, but their chemical structure remains the same.