### Hypothesis

```Hypothesis

Hypothesis: An educated guess
What you think will happen based on the
science you know.
 If I put Alka Seltzer in warm water, it will
dissolve faster than room temperature water.
 If I roll a large ball down a hill, it will go faster
than a small ball.

Independent Variable

Independent Variable: the variable you
have control over, what you can choose
and manipulate. It’s what you want to see
the effect of.

The effect of calcium chloride crystals in a
dissicator on the amount of rust of an iron
nail.
Dependent Variable

Dependent Variable: what you measure.
The variable changes or responds to the
independent variable.

The effect of temperature on mold growth on
Control

the variable is what you compare the
independent variable to. It is the same
type of substance or condition. It may be
the normal condition.
Control Variable

The effect of warm water on the rate that an
Alka Seltzer tablet dissolves.

The effect of diameter on the speed a ball
rolls down a hill.

The effect of temperature on mold growth on
Constants

Variables other than independent and
responding that are kept the same so the
only change is due to the independent
variable.
Constants

The effect of warm water on the rate that an
Alka Seltzer tablet dissolves.

The effect of diameter on the speed a ball
rolls down a hill.

The effect of temperature on mold growth on
Trials or Replications

Doing the experiment several times to
reduce errors.
Materials and Methods or
Procedures

Materials: the items used in the experiment

Method or Procedure: step by step
instructions on how to do the experiment
All of the materials should also be in the
method/procedure.

Data Table
Tables: Title that includes IV and DV.
 Place DV in columns and include units.
Divide into Trials. Rows list IV.

Change in height of Solanum lycopersicum
due to nitrogen fertilizer
N grams
Height of plants (cm)
Avg
0
6.5
5.4
5.2
17.1
1.0
12.5
12.0
12.4
12.3
2.0
15.2
16.0
15.8
14.8
Graphs

Place IV on X axis and DV on Y axis
 (Y to the sky).
Conclusions
1.
-
3 parts
Conclusion: What happened? Write
tell how the IV affected the DV
compared to the control.
Part 2: Evaluation
2. Evaluation: Why? Discuss the science of
why the results turned out how they did.
This is also where you discuss how your
method or plan could have affected the
results.
 Where mistakes were made. (Sources of
Part 3: Modifications
3. Modifications:
a. What could you do to fix problems or
b. What would be another IV you could
test or a similar experiment that you
could conduct?
Design an experiment
IV
 DV
 Control
 3 Constants

Does the wavelength of light
(ROYGBIV) affect a plant’s growth?
Design an experiment
 IV
 DV
 Control
 3 Constants
 Materials
 Method

Does Rogain really improve hair
growth?
Design an experiment
 IV
 DV
 Control
 3 Constants
 Materials
 Method

```