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Getting to Know Your Variables (Again!)
By Samantha Martin-Langmaid
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Last updated about 2 years ago
9 questions
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For each experimental question, identify the independent variable (IV), dependent variable (DV), constants and the control.
For Each, Ask Yourself:
What amÂ
I
changing
on purpose so thatÂ
I
can answer my question? -- this is your
Independent Variable
.
What is beingÂ
measured
? What data (numbers) are being collected? --this is your
Dependent Variable
.
What is
staying the same
in all of the exeriments? -- these are your
Constants
.
What is yourÂ
zero IV level
? What is your normal group that does not recieve any testing.---This is your
Control
Question 1
1.
Does the brand of allergy medication affect the number of times a person sneezes?
The number of sneezes
The time of day medicine is taken
No allergy medicine
Question 2
2.
Does the amount of soil a plant is placed in affect how tall it grows?
type of plant
Amount of soil
No soil
Question 3
3.
Which type of sunscreen prevents burns for the longest amount of time?
amount of sunscreen used
skin tone of persons being tested
No sunscreen
Question 4
4.
What paper towel brand absorbs the most water?
Size of paper towel
Temperature of water
Amount of water absorbed (mL)
Question 5
5.
Sam wants to figure out which pan cooks eggs the fastest: bronze, copper or steel.
Size of pans
Size of eggs
Temperature stove burner is set on.
Question 6
6.
Ashton wants to see which fast food restaurant has french fries that will take the longest to grow mold.
French fries are on the same table
Fries from different restraurants
Handle french fries with gloved hands
Question 7
7.
Which brand of dish soap makes the most amount of suds?
Amount of water
None (need suds to make bubbles)
Brand of dish soap.
Question 8
8.
What type of physical activity gives you the highest heart rate?
Outside temperature
Time spent on activity
Person doing the activity
Question 9
9.
What type of detergent gets out grass stains the best?
Same wash cycle
Size of original stain
Area of stain removed (cm^2)
The amount of allery medicine
The person taking the medicine
The brand of medicine
Independant Variable
Dependent Variable
Constants (3)
Control
amount of sunlight
amount of water
Height of plant (in cm)
Independant Variable
Dependent Variable
Constants (3)
Control
Time of day
Brand of sunscreen
Time to burn (minutes)
Independant Variable
Dependent Variable
Constants (3)
Control
None (need a paper towel to absorb any water)
Surface water is spilled on
Brand of paper towel.
Independant Variable
Dependent Variable
Constants (3)
Control
None (can't cook eggs without a pan)
Material pan is made out of.
Minutes until egg is cooked
Independant Variable
Dependent Variable
Constants (3)
Control
Number of french fries
Time to grow mold (days)
None (can't test without french fries)
Independant Variable
Dependent Variable
Constants (3)
Control
Amount of dish soap
Time water and soap is stirred
Volume of suds (mL)
Independant Variable
Dependent Variable
Constants (3)
Control
Heart rate (beats per minute)
Type of physical activity
Sitting (no activity)
Independant Variable
Dependent Variable
Constants (3)
Control
Brand of detergent
washed in water without detergent
Type of original stain
Independant Variable
Dependent Variable
Constants (3)
Control