Identifying Variables
Earth Science 2012
Name:
Block:
Date:
Directions: Read the scenarios provided below and list the two variables that are described.
Scenario #1: The time it takes to run a kilometer depends on the amount of exercise a person gets.
Variable 1:
Variable 2:
Scenario #2: The higher the temperature of water, the faster an egg will cook.
Variable 1:
Variable 2:
Scenario #3: An investigation was done to see if keeping the lights on for different amounts of time
each day affected the number of eggs that chickens layed.
Variable 1:
Variable 2:
Scenario #4: The temperature of water was measured at various depths of a lake.
Variable 1:
Variable 2:
Scenario #5: Grass will grow taller if it is watered a great deal and is fertilized.
Variable 1:
Variable 2:
Directions: Identify the manipulated variable in each of the following situations.
Scenario #6: The amount of pollution produced by cars was measured for cars using gasoline containing
different amounts of lead.
Scenario #7: Lemon trees receiving the most water produce the largest lemons.
Scenario #8: The amount of algae growth in lakes seems to be directly related to the number of sacks of
phosphate fertilizer sold by the local merchants.
O-V-E-R
Directions: For each of the following scenarios identify the independent and dependent variable.
Scenario #9: Students in a science class carried out an investigation in which a flashlight was pointed at
a screen. They wanted to find out if the distance from the light to the screen had any effect on
the size of the illuminated area.
IV:
DV:
Scenario #10: The number of pigs in a litter is determined by the weight of the mother pig.
IV:
DV:
Scenario #11: The State Agriculture Department has been counting the number of foxes in Brown
County. Will the number of foxes have any effect on the rabbit population?
IV:
DV:
Scenario #12: A study was done with white rats to see if the number of offspring born dead was
affected by the number of minutes of exposures to X-rays by the mother rats.
IV:
DV: