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WorksheetsBlood Spatter & Experimental Design
Total questions: 15
Worksheet time: 7mins
Which is true of independent variable?
it's found the y-axis
you should only have ONE per experiment
it is affected by the dependent variable
it is the data that we collect
I want to know if wearing uniforms improves grades. The independent variable is"
what time students wake up
what grades the students get
how good students look
whether the students wear uniforms
I want to know if swimming 3 times a week makes my hair dry/brittle. The dependent variable is
the moisture content of my hair
whether or not I swim
how much I weigh
how long my hair is
I want to know if females do better than males in Biomed classes. A control is
age of the students
gender of the students
final grade in biomed of the students
the way I teach the students
If spatter has a diameter of 12mm, how many cm is the spatter
12
1.2
120
0.12
In the blood spatter lab, all of these were constants EXCEPT what?
type of blood used
diameter of the spatter
type of dropper used
surface onto which the blood was spattered
The problem we're trying to solve in the blood spatter lab is?
What was the source of the spatter?
How big is the spatter at the scene?
From what height did the spatter fall?
How did Anna die?
To figure out the height from which spatter fell we need to
take a guess based on the trend
find a point in the the data table that most matches the diameter
find the point on the graph that most matches the diameter
find a place that best fits the line that lines up with the y-axis
All of these are true of dependent variables EXCEPT
they're also called "constants"
they're graphed on the y-axis
they show up in the data table
you typically have only one/experiment
Based on my graph, if blood has a diameter of 9mm, it fell from a height of
30 cm
50 cm
40 cm
60 cm
Based on my graph, blood falling from a height of 90 cm will have a diameter of
10mm
11mm
10.5mm
12.5mm
What is the relationship between height & spatter diameter?
There is no relationship
As height increases, spatter diameter decreases
As height increases, spatter diameter increases
It depends on the blood
The blood at the scene was type
A
B
AB
O
The blood at the scene was
definitely Anna's
Eric's or Dr. Opal's
Anna's or Dominique's or Eric's
Definitely Dr. Opal's
To know for SURE who the blood belongs to, we will need to test for
Rigor mortis
DNA
fingerprints
fibers
