Hypothesizing in Science – Lab Write-up

Science __	_________Title____________	Name: ________

Purpose: To determine whether antibacterial soap is more effective at killing bacteria than regular soap.

Hypothesis: place your IF/THEN statement here:

Materials: list of things the student used in the experiment

Procedure: 
1) 	Select 150 volunteers
2) 	Separate the volunteers into 3 groups of 50
3) 	Label the groups: regular soap users, antibacterial soap users, control (warm water)

4) __________________________________________________

5) __________________________________________________

6) __________________________________________________

7) __________________________________________________

8) __________________________________________________

9) __________________________________________________

Observations:

a)	Average bacterial counts were:
	Average Number of Bacteria per Hand (x 1,000)	
Type of Soap	Day 1 
(2nd day)	Day 3	Day 5	Day 7	
	A	B	A	B	A	B	A	B	
Regular Soap	1000	100	1000	100	1000	100	1000	100	
Antibacterial Soap	1000	1	1000	10	1000	30	1000	200	
Control	1000	500	1000	500	1000	500	1000	500	

b) 	Bar graph of bacterial counts (after washing):

c) 	It was observed that ______________________________
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Questions: List three questions that you thought of while writing the lab up.
1. __________________________________________________

2. __________________________________________________

3. __________________________________________________

Conclusions: 

1. 	How accurate do you think your results are? Explain.
__________________________________________________
__________________________________________________
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2. 	Paraphrase the student’s conclusions here:

	A) _______________________________________________

	B) _______________________________________________