Scientific Method Worksheet
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3Scientific Method worksheet
Name____________________
Section A: Senses Lab
Students will use the scientific method to determine whether sight, touch or sound is the fastest reflex. Create
a hypothesis before doing the experiment. Hypothesis: ____________________________________________
________________________________________________________________________________________
Procedure:
1. Partner with another student. One student will drop the ruler and one will catch the ruler.
2. The student dropping the ruler holds the top of the ruler vertical at the 30 cm end. The student catching the
ruler puts the top of their index finger and thumb at the 0 cm mark.
3. Once the student drops the ruler, the catcher tries to catch the ruler. Record the measurement of the top
part of their index finger. Repeat this three times.
4. Touch – Student closes eyes and the student dropping the ruler taps their partner as the ruler is released.
5. Sound – Student closes eyes and the student dropping the ruler says “now” as the ruler is released.
Data:
Trial
Sight
Touch
Sound
1
2
3
4
Average
Analysis and Conclusion:
Why were the results averaged? _____________________________________________________
What variable did you change in the experiment? _________________________________________
What happened when you changed the variable?__________________________________________
Section B: Spontaneous Generation Theory
1. For centuries, people based their beliefs on the interpretations of what they saw going on in the world
around them without testing their ideas to determine the validity of these theories – in other words, they
didn’t use the scientific method. Among these ideas, people believed that simple living organisms could
come into being by spontaneous generation. This was the idea that non-living objects can give rise to living
organisms. OBSERVATION: Every year in the spring, the Nile River flooded areas of Egypt along the river,
leaving behind nutrient-rich mud that enabled the people to grow crops. However, along with the muddy
soil, large numbers of frogs appeared that weren’t around in drier times. CONCLUSION: It was perfectly
obvious to people back then that muddy soil gave rise to frogs.
Suppose you are the scientist wanting to disprove this theory. After creating your hypothesis, what would
you do next to disprove this theory? ________________________________________________________
Section C: Animation
Click on “Animation” under “Websites-Cells” page. Watch the animation. Answer these questions.
1. What are the steps of the scientific method? ________________________________________________
____________________________________________________________________________________
2. Francesco Redi experiment: What factor did he change (independent variable)? What was the result from
the change (dependent variable)? _________________________________________________________
_____________________________________________________________________________________
3. Louis Pasteur experiment: What factor did he change (independent variable)? What was the result from the
change (dependent variable)? ____________________________________________________________
____________________________________________________________________________________
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