Physical and Chemical Changes

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 cutting, melting, and dissolving.

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 the rearrangement of atoms. Examples include rusting, burning, and digestion.

Front

Is cutting wood a physical or chemical change?

Back

Cutting wood is a physical change.

Front

What happens during rusting?

Back

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

Front

What type of change is the formation of salt (NaCl)?

Back

The formation of salt (NaCl) is a chemical change.

Front

What is an example of a physical change involving water?

Back

An example of a physical change involving water is when ice melts into liquid water.

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 results in the formation of new substances.

Front

Is chewing food a physical or chemical change?

Back

Chewing food is a physical change.

Front

What is a change in the phase of matter?

Back

A change in the phase of matter refers to the transition of a substance from one state (solid, liquid, gas) to another, such as melting or boiling.

Front

What type of change is water changing from solid to liquid?

Back

Water changing from solid to liquid is both a physical change and a change in the phase of matter.