by Physical and chemical changes
Distinguish between three states of matter
As we deal with observing things and describing them, it is important to
realize that there is an important difference between a material and an object.
Materials are the "stuff" aspect of things. Some of the qualities or properties
of materials are color, phase, clarity, degree of homogeneity, density, hardness,
and sometimes the texture and crystalline shape. Also important are the
interactions with heat and cold and with other materials.
Materials vs. Objects
It is necessary to distinguish between materials and objects. Materials are the
"stuff" aspect of things. Samples and objects are the "item"
aspect of things.
A few examples are: a pencil is an object--graphite, wood, paint, metal, and
rubber are materials from which it is made. Another example is a cast iron skillet.
The material is the cast iron and the object is the skillet, that it is round,
ten inches across, and has a handle describes the skillet but not the cast iron..
In dealing with materials, let's start with the simple appearance. One aspect of
appearance that is extremely important to chemists is the state of matter
or phase. State refers to whether the material is a solid, liquid, or gas.
Distinguish between three states of matter
As we deal with observing things and describing them, it is important to
realize that there is an important difference between a material and an object.
Materials are the "stuff" aspect of things. Some of the qualities or properties
of materials are color, phase, clarity, degree of homogeneity, density, hardness,
and sometimes the texture and crystalline shape. Also important are the
interactions with heat and cold and with other materials.
Materials vs. Objects
It is necessary to distinguish between materials and objects. Materials are the
"stuff" aspect of things. Samples and objects are the "item"
aspect of things.
A few examples are: a pencil is an object--graphite, wood, paint, metal, and
rubber are materials from which it is made. Another example is a cast iron skillet.
The material is the cast iron and the object is the skillet, that it is round,
ten inches across, and has a handle describes the skillet but not the cast iron..
In dealing with materials, let's start with the simple appearance. One aspect of
appearance that is extremely important to chemists is the state of matter
or phase. State refers to whether the material is a solid, liquid, or gas.
