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Middle School: 6th, 7th and 8th Grade
Biology
Controlled Variable
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Q.1
We control the controlled variables by keeping them...
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constant
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different
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larger
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smaller
Q.2
In an ecology experiment, we must always use quadrats of the same...
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material
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volume
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mass
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size
Q.3
In an experiment investigating the effect of acid concentration, which of these is a controlled variable?
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Volume
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Size of beaker
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Same beaker
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Time of day
Q.4
In an experiment on the effect of temperature on germination of cress seeds, which of the following would be controlled variables?
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Temperature and size of seeds
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Size of seeds and time
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pH and temperature
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Temperature and volume of water
Q.5
What is a variable?
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Any factor involved in the experiment
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No factor of relevance
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Only the controlled variable
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The factor we change
Q.6
Control variables are...
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all of the factors
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all the factors apart from the dependent and independent variables
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none of the factors
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the key independent variable
Q.7
During a drug trial, which of the following are controlled variables?
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Age and lifestyle
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Gender and age
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Gender and household income
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Age and household income
Q.8
If we fail to control variables, the results from the experiment may not be...
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real
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sufficient to draw a conclusion
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accurately recorded
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valid
Q.9
A fair test is one where everything is the kept same except for the...
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dependent variable
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controlled variable
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independent variable
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any variable
Q.10
Unless we keep the controlled variables the same, the investigation will not be...
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correct
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fair
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right
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wrong
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