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Getting to Know Your Variables (Again!)

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Last updated over 5 years ago
9 questions
Note from the author:
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Experimental Design--ID IV, DV, Constants and Controls
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
Question 1
1.

Does the brand of allergy medication affect the number of times a person sneezes?

  • The brand of medicine
  • The person taking the medicine
  • The time of day medicine is taken
Question 2
2.

Does the amount of soil a plant is placed in affect how tall it grows?

  • Height of plant (in cm)
  • No soil
  • amount of water
Question 3
3.

Which type of sunscreen prevents burns for the longest amount of time?

  • Time to burn (minutes)
  • No sunscreen
  • Brand of sunscreen
Question 4
4.

What paper towel brand absorbs the most water?

  • Brand of paper towel.
  • Temperature of water
  • Size of paper towel
Question 5
5.

Sam wants to figure out which pan cooks eggs the fastest: bronze, copper or steel.

  • Size of eggs
  • Temperature stove burner is set on.
  • Size of pans
Question 6
6.

Ashton wants to see which fast food restaurant has french fries that will take the longest to grow mold.

  • Number of french fries
  • Handle french fries with gloved hands
  • French fries are on the same table
Question 7
7.

Which brand of dish soap makes the most amount of suds?

  • Brand of dish soap.
  • Time water and soap is stirred
  • Amount of water
Question 8
8.

What type of physical activity gives you the highest heart rate?

  • Person doing the activity
  • Sitting (no activity)
  • Type of physical activity
Question 9
9.

What type of detergent gets out grass stains the best?

  • Same wash cycle
  • washed in water without detergent
  • Size of original stain
No allergy medicine
The number of sneezes
The amount of allery medicine
Independant Variable
Dependent Variable
Constants (3)
Control
amount of sunlight
type of plant
Amount of soil
Independant Variable
Dependent Variable
Constants (3)
Control
skin tone of persons being tested
Time of day
amount of sunscreen used
Independant Variable
Dependent Variable
Constants (3)
Control
Surface water is spilled on
None (need a paper towel to absorb any water)
Amount of water absorbed (mL)
Independant Variable
Dependent Variable
Constants (3)
Control
None (can't cook eggs without a pan)
Minutes until egg is cooked
Material pan is made out of.
Independant Variable
Dependent Variable
Constants (3)
Control
Fries from different restraurants
None (can't test without french fries)
Time to grow mold (days)
Independant Variable
Dependent Variable
Constants (3)
Control
Amount of dish soap
None (need suds to make bubbles)
Volume of suds (mL)
Independant Variable
Dependent Variable
Constants (3)
Control
Heart rate (beats per minute)
Time spent on activity
Outside temperature
Independant Variable
Dependent Variable
Constants (3)
Control
Brand of detergent
Area of stain removed (cm^2)
Type of original stain
Independant Variable
Dependent Variable
Constants (3)
Control