Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in which no new substances are formed. Examples include changes in state (like melting or freezing) and changes in shape or size.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of one or more new substances with different chemical properties. Examples include rusting, burning, and digestion.

Front

Which of the following indicates a chemical change: Color Change, Formation of a Precipitate, Formation of gas/bubbles, or State of matter change?

Back

Color Change, Formation of a Precipitate, and Formation of gas/bubbles indicate a chemical change. State of matter change does not.

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 new substances.

Front

Is making a paper airplane a physical or chemical change?

Back

Making a paper airplane is a physical change because it does not create a new substance.

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood, which produces ash and smoke, new substances.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water, where the substance remains H2O.

Front

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

Back

A physical change does not alter the chemical composition of a substance, while a chemical change does.

Front

What is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What does it mean if gas bubbles form during a reaction?

Back

The formation of gas bubbles during a reaction typically indicates a chemical change is occurring.