Physical and Chemical Changes Flashcardizz

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 composition of the original substance. Examples include burning, rusting, and spoiling food.

Front

Is sharpening a pencil 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

Which of the following is NOT a physical change: Cutting a pizza, Ice cubes melting, Baking cupcakes, or A chocolate bar melting?

Back

Baking cupcakes is NOT a physical change; it is a chemical change.

Front

What happens to wood when it burns?

Back

When wood burns, it undergoes a chemical change, producing heat, light, and ashes.

Front

Is spoiling food a physical or chemical 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

Can physical changes be reversed?

Back

Many physical changes can be reversed, such as freezing and melting, but some may not be easily reversible.

Front

Can chemical changes be reversed?

Back

Chemical changes are often not easily reversible, as they result in the formation of new substances.