Matter: Density and Reactions

Front

What is density?

Back

Density is the mass of a substance per unit volume.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where substances are transformed into different substances.

Front

What is a physical reaction?

Back

A physical reaction involves a change in the form or physical properties of a substance, without a chemical change.

Front

Give an example of a chemical reaction.

Back

Fire, where wood burns to form ash and smoke, is an example of a chemical reaction.

Front

Give an example of a physical reaction.

Back

Melting ice into water is an example of a physical reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is an example of a change in state?

Back

Boiling water to form steam is an example of a change in state.

Front

What is the difference between a physical and a chemical reaction?

Back

A physical reaction involves changes in physical properties without altering the substance's chemical structure, while a chemical reaction results in the formation of new substances.