4.2 Properties and Changes of Matter

Question 1

Physical Properties

Answer 1

Properties that can be observed without changing the identity of a substance

Question 2

Chemical Properties

Answer 2

Properties that can only be observed when a substance is changed into another substance

Question 3

Physical Changes

Answer 3

Usually reversible changes that do not alter the identity of a substance

Question 4

Types of Physical Changes

Answer 4

• changes of state
• separation of a mixture
• physical deformation (stretching, denting)
• making solutions

Question 5

Chemical Changes

Answer 5

Changes that occur when one substance is transformed into another substance
-difficult to reverse