Density is a physical property of matter that expresses a relationship of mass to volume. The more mass an object contains in a given space, the more dense it is.

Density defined in a qualitative manner as the measure of the relative “heaviness” of objects with a constant volume. For example: A rock is obviously more dense than a crumpled piece of paper of the same size. A styrofoam cup is less dense than a ceramic cup.

Mass and volume are physical properties of a substance that can be determined without changing it. Each of these however change with change in amount of substance. The density of a substance remains constant and do not depend on the amount of substance. Thus, density is considered to be as physical property.

intensive property

Density can be established simply by determining the mass and volume of substance, no reaction is involved, so its a physical property.

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

A change in size or shape is a physical change. 16. A chemical change means a new substance with new properties was formed. When milk turns sour, this is a physical change because a change in odor does not indicate a chemical change.

Physical properties can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity, and many others.

Mixing baking soda and vinegar will create a chemical reaction because one is an acid and the other a base. Baking soda is a basic compound called sodium bicarbonate while vinegar is a diluted solution that contains acetic acid (95% water, 5% acetic acid).

bitter taste = physical taste 2.

Bitter Taste Receptors Chemical compounds, such as quinine, produce a bitter taste by binding taste bud receptors that couple to G-proteins. G-protein activation initiates a signaling cascade that produces the sensation of bitterness.

Examples of physical propertiesare: color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or repulsion (diamagnetic) to magnets, opacity, viscosity and density.

a change in size, shape, or state – but haven’t made a new substance. An apple is cut. Heat changes H2O to steam.

PHYSICAL CHANGE CHEMICAL CHANGE

A chemical change breaks apart or rearranges the atoms or molecules of the object, resulting in a new substance. Toasting the bread and digesting the toast are both examples of chemical changes. Chemical changes cannot be reversed. You cannot un-toast or un-digest the bread.