Chemical and Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties.

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.

Front

Give an example of a chemical change.

Back

Rust forming on an iron fence is an example of a chemical change.

Front

What happens to the mass of matter during a physical change?

Back

The mass of matter remains the same during a physical change, as no new substances are created.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

Front

What is an example of a physical change?

Back

Dissolving salt in water is an example of a physical change.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not change the chemical composition of the substance.

Front

What is an indicator 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 occurs when cake batter is baked?

Back

When cake batter is baked, a chemical change occurs as new substances are formed through the cooking process.

Front

What happens to wood when it is burned?

Back

When wood is burned, a chemical change occurs, resulting in ash, smoke, and other new substances.