How do we do a fair test?

Use the same apparatus.
Do the test in ths same place.
All things that you need to use in the test should be the same expect the things that you waht to test.
Do you understand?

To do a fair test , you should keep everything the same!

2007-01-13 07:12:43 補充：
To carry out a faor test, we need to keep all conditions the same expect the one we are investigating

fair test? are you talking about science? what do you mean?

2007-01-13 18:32:57 補充：
you should keep all the variables are the same, except the independent variables!