LESSON ONE: TYPES OF EXPERIMENTS AIMS AND HYPOTHESES Research methods.
Variables in Scientific Experiments & Writing Hypotheses.
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Transcript of Variables in Scientific Experiments & Writing Hypotheses.
![Page 1: Variables in Scientific Experiments & Writing Hypotheses.](https://reader038.fdocuments.us/reader038/viewer/2022100509/56649f4e5503460f94c6ee12/html5/thumbnails/1.jpg)
Variables in Scientific Experiments
&Writing Hypotheses
![Page 2: Variables in Scientific Experiments & Writing Hypotheses.](https://reader038.fdocuments.us/reader038/viewer/2022100509/56649f4e5503460f94c6ee12/html5/thumbnails/2.jpg)
Independent Variable = “The Cause”
• The one thing the scientist changes in the experiment.
• The scientist controls this variable.• On a graph, it is on the x-axis (bottom).
![Page 3: Variables in Scientific Experiments & Writing Hypotheses.](https://reader038.fdocuments.us/reader038/viewer/2022100509/56649f4e5503460f94c6ee12/html5/thumbnails/3.jpg)
Dependent Variable = “The Effect”
• The results of the experiment.• What the scientist measures!• On a graph, it is on the y-axis (vertical side)
![Page 4: Variables in Scientific Experiments & Writing Hypotheses.](https://reader038.fdocuments.us/reader038/viewer/2022100509/56649f4e5503460f94c6ee12/html5/thumbnails/4.jpg)
Control Variables
• The variables the scientist keeps the same throughout the experiment.
• Remember—The only thing that can be different in an experiment is the independent variable.
![Page 5: Variables in Scientific Experiments & Writing Hypotheses.](https://reader038.fdocuments.us/reader038/viewer/2022100509/56649f4e5503460f94c6ee12/html5/thumbnails/5.jpg)
Examples
The independent variable causes the dependent variable to change.
Example 1 in handout!
Example 2 in handout!
![Page 6: Variables in Scientific Experiments & Writing Hypotheses.](https://reader038.fdocuments.us/reader038/viewer/2022100509/56649f4e5503460f94c6ee12/html5/thumbnails/6.jpg)
Example 3
3. Example: Lemon trees receiving the most water produce the largest lemons.
I=_______________ D=________________
![Page 7: Variables in Scientific Experiments & Writing Hypotheses.](https://reader038.fdocuments.us/reader038/viewer/2022100509/56649f4e5503460f94c6ee12/html5/thumbnails/7.jpg)
How to Write a Hypothesis
• If_____then____ statement• If IV then DV because statement.
Example: Increased sleep may cause higher grades.
If __________________________________then____________________________________because____________________________________.