Chapter 15: Classification of Matter

Fog

Fog

________ is a colloid composed of water droplets suspended in air.

Distillation

________: The process for separating substances in a mixture by evaporating a liquid and recondensing its vapor.

Suspension

________: a heterogeneous mixture containing a liquid in which visible particles settle.

Milk

________ is an example of a specific kind of mixture called a colloid.

Physical Property

________: Any characteristic of a material that you can observe without changing the identity of the substances that make up the material.

Tarnish

________ is a chemical reaction between silver metal and sulfur compounds in the air which results in silver sulfide.

Solution

________: a homogeneous mixture of particles so small that they can not be seen with a microscope and will never settle to the bottom of their container.

Compound

________: a substance in which the atoms of two or more elements are combined in a fixed proportion.

Element

________: If all the atoms in a substance have the same identity.

Colloid

________: a type of mixture with particles that are larger than those in solutions but not heavy enough to settle out.

chemical changes

In some ________, a rapid release of energy- detected as heat, light, and sound- is a clue that changes are occurring.

Materials

________ are made of a pure substance or a mixture of substances.

Homogeneous Mixture

________: contains two or more gaseous, liquid, or solid substances blended evenly throughout.

Chemical Change

________: A change of one substance to another.

Physical property

________ can be used to separate substances in a mixture.

Substance

a type of matter with a fixed composition

Element

If all the atoms in a substance have the same identity

Compound

a substance in which the atoms of two or more elements are combined in a fixed proportion

Solution

a homogeneous mixture of particles so small that they cannot be seen with a microscope and will never settle to the bottom of their container

Colloid

a type of mixture with particles that are larger than those in solutions but not heavy enough to settle out

Tyndall Effect

The scattering of light by colloidal particles

Physical Property

Any characteristic of a material that you can observe without changing the identity of the substances that make up the material

Physical Change

A change in size, shape, or state of matter

Distillation

The process for separating substances in a mixture by evaporating a liquid and recondensing its vapor

Chemical Property

a characteristic of a substance that indicates whether it can undergo a certain chemical change

Chemical Change

A change of one substance to another

Weathering

Chemical or Physical Change

Law of Conservation of Mass

the mass of all substances that are present before a chemical change equals the mass of all the substances that remain after the change