Physical vs 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 a chemical reaction and changes the chemical composition of the substance. Examples include rusting, burning, and cooking.

Front

Using bleach to get rid of a stain on a shirt is a _____ change.

Back

Chemical

Front

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

Back

Rust

Front

Is melting butter for popcorn a chemical or physical change?

Back

Physical

Front

Silverware tarnishing is an example of a _____ change.

Back

Chemical

Front

Is mixing chocolate syrup into milk a chemical or physical change?

Back

Physical

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 happens to the molecules during a physical change?

Back

During a physical change, the molecules may change their arrangement or state (solid, liquid, gas) but their chemical structure remains the same.

Front

What happens to the molecules during a chemical change?

Back

During a chemical change, the molecules break apart and rearrange to form new substances with different chemical properties.