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