Physical & Chemical Change

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 cutting, bending, or melting.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting, burning, and cooking.

Front

What happens to a popsicle when it melts?

Back

When a popsicle melts, it undergoes a physical change from solid to liquid due to the addition of heat.

Front

What is freezing?

Back

Freezing is the process in which a liquid turns into a solid as it loses heat.

Front

What happens when you cut your hair?

Back

Cutting your hair is a physical change because it alters the appearance of the hair but does not change its chemical structure.

Front

What happens when you cut paper?

Back

Cutting paper is a physical change because it changes the shape and size of the paper without altering its chemical composition.

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood, which produces ash and smoke, changing the original substance into new substances.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice, which changes from solid to liquid but remains water.

Front

What occurs during a chemical reaction?

Back

During a chemical reaction, substances undergo a chemical change, resulting in the formation of new substances with different properties.

Front

What is evaporation?

Back

Evaporation is the process by which a liquid changes into a gas, usually when heat is applied.