Transcript Writing A Proper Hypothesis

Vocabulary
 Hypothesis
A hypothesis is a tentative statement
that proposes a possible explanation to
some phenomenon or event. A useful
hypothesis is a testable statement
which may include a prediction.
Writing A Proper
Hypothesis
Using the “If / Then” Method
Parts of the Statement
 Independent Variable:
The condition be studied. It is controlled by the
experimenter. The thing we change
ex. Water
 Dependent Variable:
The condition affected by the ind. variable. It can’t be
controlled by the experimenter.
ex. Plant Growth
 Control:
The condition that is represented in a normal
situation.
Steps to Writing the “If” section of
your Hypothesis
1. Start your sentence with the word “If”
2. Write down one of the variables
3. Connect statement with one of the following:
is related to
is affected by
causes
4. Write down the other variable
5. Write a because section stating an
observation that explains your hypothesis.
Writing the “Then” section of your
Hypothesis
 Write the word then (following the “if” section)
 Make a comment on the relationship between
those two variables.
Ex. If section:
If water is related to plant growth,
Ex. Then section:
then the more you water plants, the
bigger they will grow.
Ex. Because section:
because without water plants
cannot grow
Final “If / Then” Statement
If water is related to plant growth,
then the more you water plants, the
bigger they will grow, because
without water plants cannot grow.
Hypothesis
Temperature may cause leaves to
change color.
or
If leaf color change is related to
temperature, then exposing plants
to varied temperatures will result in
changes in leaf color, because I
observe as the seasons change the
leaves change color.
Hypothesis
Ultra violet light may cause skin cancer.
or
If skin cancer is related to ultraviolet
light , then people with a high exposure
to UV light will have a higher frequency
of skin cancer, because I observe people
with skin cancer usually spend a lot of
time in the sun.