Physical & Chemical Properties Text Review

Front

What is the difference between physical and chemical properties?

Back

Physical properties can be observed without changing the substance (e.g., color, mass), while chemical properties describe how a substance reacts with others (e.g., flammability, reactivity).

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 (e.g., cutting, melting).

Front

What is a chemical change?

Back

A chemical change occurs when a substance transforms into a different substance with different properties (e.g., rusting, burning).

Front

What evidence indicates a chemical change has occurred?

Back

Evidence of a chemical change includes color change, gas production (bubbles), temperature change, and formation of a precipitate.

Front

Is mass a reliable way to identify an unknown object?

Back

No, mass alone is not a reliable way to identify an unknown object because different substances can have the same mass.

Front

What happens to the properties of a substance during a chemical change?

Back

The properties of the original substance change, and new properties emerge in the new substance formed.

Front

What is an example of a physical change?

Back

Cutting a piece of paper is an example of a physical change because the paper remains paper.

Front

What is an example of a chemical change?

Back

Baking soda reacting with vinegar to produce carbon dioxide gas is an example of a chemical change.

Front

What is the significance of temperature change in a chemical reaction?

Back

Temperature change can indicate that a chemical reaction is occurring, often releasing or absorbing energy.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each retains its own properties (e.g., salad, air).