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 freezing, melting, and dissolving.

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 properties. Examples include rusting, burning, and baking.

Front

Is freezing juice a physical or chemical change?

Back

Freezing juice is a physical change.

Front

Which of the following is NOT an example of a physical change: crumpled paper, pencil sharpening, shrunken clothing, or rust?

Back

Rust is NOT an example of a physical change.

Front

What happens during a chemical reaction?

Back

During a chemical reaction, one or more substances are transformed into new substances with different properties.

Front

Give an example of a chemical reaction.

Back

Baking cookies is an example of a chemical reaction.

Front

Is melting butter for popcorn a chemical or physical change?

Back

Melting butter for popcorn is a physical change.

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

What is an example of a physical change in everyday life?

Back

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

Front

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

Back

A physical change does not change the substance's chemical identity, while a chemical change results in new substances being formed.