Physical vs. Chemical change

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

Front

Is mixing lemonade powder with water a physical or chemical change?

Back

Physical change.

Front

Is squeezing oranges to make orange juice a physical or chemical change?

Back

Physical change.

Front

Is melting butter for popcorn a chemical or physical change?

Back

Physical change.

Front

Are fireworks exploding a physical or chemical change?

Back

Chemical change.

Front

Is spoiled meat a chemical or physical change?

Back

Chemical 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 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 rearrange to form new substances with different chemical properties.