Q.1.
Control variables are...
Q.2.
In an experiment investigating the effect of acid concentration, which of these is a controlled variable?
Q.3.
Unless we keep the controlled variables the same, the investigation will not be...
Q.4.
What is a variable?
Q.5.
If we fail to control variables, the results from the experiment may not be...
Q.6.
In an ecology experiment, we must always use quadrats of the same...
Q.7.
In an experiment on the effect of temperature on germination of cress seeds, which of the following would be controlled variables?
Q.8.
We control the controlled variables by keeping them...
Q.9.
A fair test is one where everything is the kept same except for the...
Q.10.
During a drug trial, which of the following are controlled variables?