This is a lab I enjoy doing that I learned from another wonderful science teacher, and the students love it. Marcia Daubenmire Fort King Middle School Ocala BLOOD SPLATTER
DETECTIVES
Question:
How does changing the distance effect how a drop of blood falls?
Research
Independent Variable: ______________________________________________
Dependent Variable: _______________________________________________
Constants: ________________________________________________________
Control (What could be a control?): ____________________________________
Hypothesis: If (the dependent variable) is related to the (independent variable),
then (prediction of what would happen to the dependent variable if the independent
variable is increased or decreased) because (why the variable changed).
Experiment
Materials- artificial blood, dropper, test tube, paper, ruler, meter stick
Procedure
1. Put the dropper 10 cm above the paper and drop one drop of blood. Be
careful and do not get blood on the floor, table or your stuff.
2. Measure the diameter of the spatter in MILLIMETERS (mm). Write it
down in the observation table.
3. Repeat this process with 20 cm to 200 cm. For higher heights, you may
need to stand on a chair and use newspaper to prevent accidents.
4. After experiment is completed, get a mystery splatter from your teacher.
Measure it and see if you can figure out how far the blood dropped.
Analysis
Data
Distance
Diameter
Trial 1
Diameter
Trial 2
Diameter
Trial 3
Average
10 cm
25 cm
40 cm
55 cm
70 cm
85 cm
100 cm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
Graph Results
Put the independent variable on the X AXIS and the dependent variable on the
Y AXIS. Make sure you include a title, labels, and units on your graph. Your
graph should be completed on graph paper and should be neat and COLORFUL.
Conclusion Answer the following using complete sentences written as a paragraph
Complete sentence saying whether your hypothesis was supported or not support.
Describe the data collected in detail (what happened during your trials and explain
using actual data from your experiment)
What was your mystery splatter number? What was the diameter of your mystery
splatter? How far do you think your mystery splatter dropped? Explain. Hint: you
will need to use your graph
What did this experiment demonstrate? How or why? Did something happen that
might have made the results incorrect? What could you are we have done to make
this experiment more accurate?
Name _____________________
Date ______________________
Period _____________________
BLOOD SPLATTER
DETECTIVES
Lab Report
Question:
_________________________________________________________________
Research
Independent Variable: ______________________________________________
Dependent Variable: _______________________________________________
Constants: ________________________________________________________
Control (What could be a control?): ____________________________________
Hypothesis:
If ________________________ is related to ________________________, then
_____________________________________________________________________________
because ____________________________________________________________________.
Experiment:
Follow procedures on lab paper.
Analysis
Data
Distance
Diameter
Trial 1
Diameter
Trial 2
Diameter
Trial 3
Average
10 cm
25 cm
40 cm
55 cm
70 cm
85 cm
100 cm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
Graph Results (Label the X and Y axis and give the graph a title). This should be a line graph.
__________________________________
Conclusion (Answer the questions in a paragraph form?)
Restate hypothesis. Complete sentence saying if your hypothesis was supported or not. Describe the data collected in detail (what
happened during your trials and explain using actual data from your experiment.)
What was your mystery splatter number? What was the diameter of your mystery splatter? How far do you think your mystery splatter
dropped? Explain. Hint: you will need to use your graph.
What did this experiment demonstrate? Did something happen that might have made the results incorrect? What could you are we
have done to make this experiment more accurate?
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
Mystery splatter number __________. Diameter of mystery splatter ________________.
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
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