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Worksheets1.1 Experimental Variables and Control Groups
Total questions: 13
Worksheet time: 9mins
How many variables are changed purposefully by a scientist in a controlled experiment?
1
2
4
5
(1.1/3A-B Def) In an experiment the ______ is changed by the experimenter and the ______ responds as a result of changes.
controlled variable, dependent variable
independent variable, dependent variable
dependent variable, independent variable
independent variable, controlled variable
(1.1/3A-B ID) Below is a scenario. What is the IV? What is the DV?
IV- Tomato yield; DV-Amount of sunlight
IV: Tomato yield; DV: Amount of water
IV: Soil pH; DV: The group with the normal soil pH
IV: Amount of water; DV: Tomato yield
(1.1/3C Def) Any factor(s) that may influence the outcome of an experiment that are held constant are
independent variables
control groups
controlled variables/constants
dependent variables
(1.1/3C ID) What are controlled variables/constants if IV is the amount of water and DV is tomato yield?
Presence or absence of fertilizer, soil pH, number of tomatoes produced.
Number of tomatoes produced, amount of water, species of tomato plant.
Soil pH, amount of sunlight, species of tomato plant.
Amount of water, soil pH, amount of sunlight.
(1.1/3D) Below is a scenario. What is the control group if the IV is the amount of water and DV is tomato yield?
Group with the recommended amount of water.
Group with the most water.
Group with the most tomatoes produced.
Group with the normal number of tomatoes produced.
(1.1/3D) In an experiment, the group that is used as a standard for comparison is the
Controlled Variables
Dependent Variable
Independent Variable
control group(s)
(1.1/7) Why is this experiment flawed?
The plants will recieve too much sunlight and water.
The plants will not receive enough water.
This has too many variables that are being changed.
There is not a dependent variable.
(1.1/7) What is the IV in this data table?
Amount of food (during larval stage)
Body Length (mm)
Drawing of Adult Beetle
Horn Length (mm)
(1.1/8A, B) What is the IV on the graph below?
Average monthly rainfall and temperature
Time (Months)
Amount of energy per square meter
August
1.1/8A, B What is the DV(s) on the graph below?
Average monthly rainfall and temperature
Amount of energy per square meter
Time (Months)
June
(1.1/8A) What is the IV on the graph below?
Number of mutant bacteria cells
E. coli
Bacteria populations
Time bacteria were exposed to UV (min.)
1.1/8A What is the DV on the graph below?
Number of mutant bacteria cells
Time bacteria were exposed to UV (min.)
E. coli
Bacteria populations
