Properties of Matter (1.2.4)

Question 1

The Properties of Matter

Answer 1

Properties of matter can be divided into quantitative versus qualitative, chemical versus physical, and intensive versus extensive.

Question 2

Density

Answer 2

Density is an intensive property that is a combination of two extensive properties.

Question 3

Physical changes

Answer 3

Physical changes do not alter the composition of a substance, while chemical changes do alter the composition of a substance.

Question 4

Properties of matter can be divided into quantitative
versus qualitative, chemical versus physical, and
intensive versus extensive.

Quantitative properties (such as mass or volume)
are described in terms of a number with units.
Qualitative properties (such as color or odor) do not
include a number.

Chemical properties describe how a substance will
react chemically. Physical properties can be
observed or measured.

Answer 4

Properties of matter can be divided into quantitative
versus qualitative, chemical versus physical, and
intensive versus extensive.

Quantitative properties (such as mass or volume)
are described in terms of a number with units.
Qualitative properties (such as color or odor) do not
include a number.

Chemical properties describe how a substance will
react chemically. Physical properties can be
observed or measured.

Question 5

Intensive properties do not depend on the amount of
a substance. For example, the boiling point of a
small pot of water is the same as the boiling point of
a large pot of water. Intensive properties can be
used to identify substances.

Extensive properties depend on the amount of a
substance. For example, the mass of one “stuff
model” is not the same as the mass of three “stuff
models”.

Density is an intensive property, but is made up of
two extensive properties (mass and volume). Since
the density of a substance does not depend on how
much of that substance is present, density can be
used to distinguish between different substances.

Answer 5

Intensive properties do not depend on the amount of
a substance. For example, the boiling point of a
small pot of water is the same as the boiling point of
a large pot of water. Intensive properties can be
used to identify substances.

Extensive properties depend on the amount of a
substance. For example, the mass of one “stuff
model” is not the same as the mass of three “stuff
models”.

Density is an intensive property, but is made up of
two extensive properties (mass and volume). Since
the density of a substance does not depend on how
much of that substance is present, density can be
used to distinguish between different substances.

Question 6

Physical changes do not alter the composition of a
substance. For example, even if a candle is melted,
it is still made of wax.

Chemical changes alter the composition of a
substance. For example, if a candle is burnt, the
wax changes into carbon dioxide and water.

Answer 6

Physical changes do not alter the composition of a
substance. For example, even if a candle is melted,
it is still made of wax.

Chemical changes alter the composition of a
substance. For example, if a candle is burnt, the
wax changes into carbon dioxide and water.

Question 7

Physical Property

Answer 7

A characteristic that can be observed or measured without changing the composition of the substance.

Question 8

Chemical Property

Answer 8

A characteristic that describes how a substance will react chemically.