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 melting, freezing, 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 breaking and forming bonds between atoms. Examples include burning, rusting, and cooking.

Front

Which of the following is NOT an example of a chemical change? sour milk, burning wood, breaking a pencil, rust

Back

Breaking a pencil is NOT an example of a chemical change; it is a physical change.

Front

What happens during a chemical change?

Back

During a chemical change, the substances involved undergo a transformation that results in the formation of new substances with different properties.

Front

Is melting ice cream a physical or chemical change?

Back

Melting ice cream is a physical change.

Front

What is an example of a chemical change?

Back

An example of a chemical change is fireworks exploding.

Front

What is rusting?

Back

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

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water.

Front

What are some indicators of a chemical change?

Back

Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Front

Is burning wood a physical or chemical change?

Back

Burning wood is a chemical change.