Physical and Chemical Properties/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 the rearrangement of atoms. Examples include burning, rusting, and souring of milk.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing the substance's chemical identity. Examples include color, density, volume, and state of matter.

Front

What is a chemical property?

Back

A chemical property is a characteristic of a substance that becomes evident during a chemical reaction. It describes the substance's potential to undergo chemical changes. Examples include flammability and reactivity with acids.

Front

What happens to ice cream when it melts?

Back

When ice cream melts, it undergoes a physical change from solid to liquid due to an increase in temperature.

Front

What is the volume of 150 grams of lead with a density of 11.3 g/cm³?

Back

The volume is 13.3 cm³.

Front

Which of the following is NOT a physical change: crumpled paper, pencil sharpening, shrunken clothing, or sour milk?

Back

Sour milk is NOT a physical change; it is a chemical change.

Front

What is an example of a physical property of mercury?

Back

Mercury is a metal that is liquid at room temperature, which is a physical property.

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What is the difference between physical and chemical changes?

Back

Physical changes do not alter the chemical composition of a substance, while chemical changes result in new substances being formed.

Front

What is an example of a chemical change?

Back

Burning wood in a bonfire is an example of a chemical change.