Science Flashcard

Front

What is a Chemical Change (CC)?

Back

A process where substances combine or break apart to form new substances, often accompanied by energy changes.

Front

What is a Physical Change (PC)?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

Example of a Chemical Change: Bread molding

Back

Bread molding is a chemical change because it involves the growth of mold, which is a new substance.

Front

Example of a Chemical Change: Striking a match

Back

Striking a match is a chemical change because it produces heat and light, resulting in new substances.

Front

Example of a Physical Change: Freezing popsicles

Back

Freezing popsicles is a physical change because it changes the state of water from liquid to solid without altering its chemical structure.

Front

Example of a Chemical Change: Burning a candle

Back

Burning a candle is a chemical change because it transforms wax into carbon dioxide and water vapor.

Front

Example of a Chemical Change: Bleaching your hair

Back

Bleaching hair is a chemical change because it alters the chemical structure of the hair pigment.

Front

What are indicators of a Chemical Change?

Back

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

Front

What are indicators of a Physical Change?

Back

Indicators include changes in state (solid, liquid, gas), shape, and size without new substances forming.

Front

Is dissolving sugar in water a Chemical Change or Physical Change?

Back

Dissolving sugar in water is a physical change because the sugar can be recovered by evaporation.