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 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 rotting.

Front

Is freezing juice a physical or chemical change?

Back

Freezing juice is a physical change.

Front

Is rotting bananas a physical or chemical change?

Back

Rotting bananas is a chemical change.

Front

What happens when a piece of wood burns?

Back

When a piece of wood burns, a chemical change takes place.

Front

Is exploding fireworks a physical or chemical change?

Back

Exploding fireworks is a chemical change.

Front

Is melting a chocolate bar a physical or chemical change?

Back

Melting a chocolate bar is a physical change.

Front

What are some indicators of a chemical change?

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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 the kitchen?

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An example of a physical change in the kitchen is chopping vegetables.

Front

What is an example of a chemical change in cooking?

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An example of a chemical change in cooking is baking a cake, where ingredients react to form new substances.