Physical & Chemical Properties & Changes

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing its identity, such as color, hardness, and density.

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to change into different substances, such as flammability and reactivity.

Front

What is hardness in terms of material properties?

Back

Hardness is a physical property that measures a material's resistance to deformation or scratching.

Front

What does the blue color of a substance indicate?

Back

The blue color is a physical property that describes the appearance of the substance without altering its chemical composition.

Front

What is density?

Back

Density is a physical property defined as mass per unit volume of a substance, often expressed in grams per cubic centimeter (g/cm³).

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting or boiling.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, such as rusting of iron or burning wood.

Front

Give an example of a physical change.

Back

An example of a physical change is ice melting into water.

Front

Give an example of a chemical change.

Back

An example of a chemical change is the reaction of vinegar and baking soda producing carbon dioxide gas.

Front

What happens during a fireworks show?

Back

During a fireworks show, the explosion of fireworks is a chemical change that produces heat and light.