2. •Pre-Activity: Supply the answers in the
given table.
Available information Question Answer
Hydrochloric acid contains What kind of
hydrogen. Nitric acid contains substance is an
hydrogen. acid?
In studying about the effects of What is a
fertilizer on the rate of growth of possible
okra plant, the amount of fertilizer definition of the
can be defined as the weight of rate of growth?
fertilizer in mg given to the plant.
3. Activity: Making Operational
Definition
Procedure:
( Refer to your activity sheet)
REMINDER: BE CAREFUL IN
HANDLING THE BEAKER
AND GRAD. CYLINDER
4. Defining Operationally Implies:
a. Stating specific information
about an object or phenomenon
based on experiences with it, and
b. making working definitions.
• This helps us give a precise
explanation.
5. • On the other hand, defining variables
operationally means specifying the
variables and how they can be
measured.
• They may be specified differently for
different investigations.
• This skill is very useful in carrying
out investigations so that precise data
can be obtained.
6. Displacement Method
• The water displacement method is used to
find the volume of an irregularly shaped
object.
• This method was discovered by
Archimedes in Ancient Greece, while he
was taking a bath. He was so excited at
his discovery that he ran through the
streets of Athens naked, shouting Eureka!
8. • Start with a known volume of water. It is
easiest to use a graduated cylinder or
beaker, as they have volume
measurements along the side. Record that
volume.
• Add the solid object. Measure the new
volume in the beaker.
• Subtract the two volumes, to get the
amount of water displaced. This is the
volume of the solid object.
9. How to read the volume of a liquid
in a beaker / grad. cylinder
correctly?
11. VOLUME
• space inside object: the size of a
three-dimensional space enclosed
within or occupied by an object
Symbol
• Examples: Volume of some Regular Objects
cube = a3
rectangular prism = a b c or LWH
