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Biblioteka

Getting to Know Your Variables (Again!)

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Posljednje ažuriranje almost 6 years ago
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Napomena autora:

Experimental Design--ID IV, DV, Constants and Controls

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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

Pitanje 1
1.

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

  • The brand of medicine

  • The amount of allery medicine

  • The time of day medicine is taken

  • No allergy medicine

  • The number of sneezes

  • The person taking the medicine

  • Independant Variable

  • Dependent Variable

  • Constants (3)

  • Control

Pitanje 2
2.

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

  • Height of plant (in cm)

  • amount of sunlight

  • amount of water

  • No soil

  • Amount of soil

  • type of plant

  • Independant Variable

  • Dependent Variable

  • Constants (3)

  • Control

Pitanje 3
3.

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

  • Time of day

  • No sunscreen

  • skin tone of persons being tested

  • Time to burn (minutes)

  • Brand of sunscreen

  • amount of sunscreen used

  • Independant Variable

  • Dependent Variable

  • Constants (3)

  • Control

Pitanje 4
4.

What paper towel brand absorbs the most water?

  • None (need a paper towel to absorb any water)

  • Surface water is spilled on

  • Amount of water absorbed (mL)

  • Temperature of water

  • Brand of paper towel.

  • Size of paper towel

  • Independant Variable

  • Dependent Variable

  • Constants (3)

  • Control

Pitanje 5
5.

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

  • Material pan is made out of.

  • Size of pans

  • None (can't cook eggs without a pan)

  • Size of eggs

  • Temperature stove burner is set on.

  • Minutes until egg is cooked

  • Independant Variable

  • Dependent Variable

  • Constants (3)

  • Control

Pitanje 6
6.

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

  • Fries from different restraurants

  • None (can't test without french fries)

  • Time to grow mold (days)

  • French fries are on the same table

  • Handle french fries with gloved hands

  • Number of french fries

  • Independant Variable

  • Dependent Variable

  • Constants (3)

  • Control

Pitanje 7
7.

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

  • None (need suds to make bubbles)

  • Amount of dish soap

  • Volume of suds (mL)

  • Amount of water

  • Brand of dish soap.

  • Time water and soap is stirred

  • Independant Variable

  • Dependent Variable

  • Constants (3)

  • Control

Pitanje 8
8.

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

  • Outside temperature

  • Heart rate (beats per minute)

  • Sitting (no activity)

  • Type of physical activity

  • Person doing the activity

  • Time spent on activity

  • Independant Variable

  • Dependent Variable

  • Constants (3)

  • Control

Pitanje 9
9.

What type of detergent gets out grass stains the best?

  • washed in water without detergent

  • Type of original stain

  • Area of stain removed (cm^2)

  • Size of original stain

  • Same wash cycle

  • Brand of detergent

  • Independant Variable

  • Dependent Variable

  • Constants (3)

  • Control