V. Properties and Changes of Matter

Question 1

Physical properties:

Answer 1

Properties that can be observed or measured without changing the substance into another substance

Question 2

Ex. of physical properties?

Answer 2

Density, boiling point, melting point, texture, shape, color

Question 3

Physical properties are either…?

Answer 3

Extensive properties and Intensive properties

Question 4

Extensive properties:

Answer 4

depend on the amount of matter that is present.

Question 5

Ex. of extensive properties?

Answer 5

mass, volume, length

Question 6

Intensive Properties:

Answer 6

do not depend on the amount of matter present

Question 7

Ex. of intensive properties?

Answer 7

Density, color, hardness

Question 8

Chemical properties:

Answer 8

Properties that relate to a substance’s ability to change (reactions) - produce a new substance

Question 9

Ex. of chemical properties?

Answer 9

Rusting, tarnishing, supports combustion, decomposes when exposed to light, reacts with acids, water, or oxygen

Question 10

Physical change:

Answer 10

original substance or substances is not chemically changed. original substance is physically altered, but still present.

Question 11

Ex. of physical changes?

Answer 11

Evaporation, dissolving salt in water, cutting, melting, grinding, folding paper, crushing rocks, evaporation, food coloring in water.

Question 12

Chemical change (reactions):

Answer 12

Original substance or substances = reactants
New substance or substances formed = products
bonds are broken - atoms are rearranged - new bonds form

Question 13

Ex. of chemical change?

Answer 13

Burning, rusting, baking, combustion, milk sours, decomposing, tarnishing silver, rotting, neutralizing of an acid

Question 14

What is not a chemical change?

Answer 14

Change of state & dissolving