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Getting to Know Your Variables (Again!)

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