Physical vs 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 ice or tearing paper.

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 includes processes like burning, rusting, and souring.

Front

Give an example of a chemical change.

Back

Examples of chemical changes include milk turning sour, toasting bread, and baking a cake.

Front

What happens to the temperature during a chemical reaction?

Back

During a chemical reaction, the temperature can change as energy is absorbed or released.

Front

Is crumpling paper a physical or chemical change?

Back

Crumpling paper is a physical change because it does not change the chemical composition of the paper.

Front

Is sour milk a physical or chemical change?

Back

Sour milk is a chemical change because it involves a change in the chemical composition of the milk.

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 is an example of a physical change?

Back

Examples of physical changes include freezing water, dissolving sugar in water, and chopping vegetables.

Front

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

Back

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

Front

What is an example of a process that is NOT a chemical change?

Back

An example of a process that is NOT a chemical change is sharpening a pencil.